validating schema instance with xerces?

[LKirschner@vencast.com]

This is a light-weight question for this group, but I don't know where else
to post it, and I could really use some help. I am having trouble
validating documents against a schema with xerces1.2.3.  The schema is at
the url indicated in the instance document and it is world readable, but I
keep getting the following error:

org.xml.sax.SAXParseException: General Schema Error: Grammar with uri 2:
http://schemahost/xml/namespaces/db_bean , can not found.

My schema and instance document are as follows:

Instance doc:

<?xml version="1.0" ?>

     <db_bean xmlns="http://schemahost/xml/namespaces/db_bean"
     xmlns:xsi="http://www.w3.org/2000/10/XMLSchema-instance"
     xsi:schemaLocation="http://schemahost/xml/namespaces/db_bean
     http://schemahost/xml/namespaces/db_bean/db_bean.xsd"
     class="com.vencast.bean.db.DealCategory">
        <property name="Seq">
            <java.lang.Integer>6</java.lang.Integer>
        </property>
        <property name="DealId">
            <java.lang.Integer>9999</java.lang.Integer>
        </property>
        <property name="CategoryId">
            <java.lang.Integer>11256</java.lang.Integer>
        </property>
        <property name="LevelId">
            <java.lang.Integer>1</java.lang.Integer>
        </property>
        <property name="ParentCategoryId">
            <java.lang.Integer>11256</java.lang.Integer>
        </property>
        <property name="DefaultSubcategoryId">
            <java.lang.Integer>0</java.lang.Integer>
        </property>
        <property name="CategoryDesc">
            <java.lang.String>Q &amp; A</java.lang.String>
        </property>
        <property name="TargetUrl">
            <java.lang.String>contentdisplay.jhtml</java.lang.String>
        </property>
       <property name="CategoryDescU">
            <java.lang.String>q_n_a</java.lang.String>
        </property>
        <property name="LastUpdateDate">
            <java.sql.Date>2001-03-13</java.sql.Date>
        </property>
        <property name="LastUpdateBy">
            <java.lang.Integer>351700193</java.lang.Integer>
        </property>
        <property name="VirtualDelete">
            <java.lang.Integer>0</java.lang.Integer>
        </property>
    </db_bean>



Schema:

<schema xmlns="http://www.w3.org/2000/10/XMLSchema"
          targetNamespace="http://schemahost/xml/namespaces/db_bean"
          xmlns:xsi="http://www.w3.org/2000/10/XMLSchema-instance"
          xsi:schemaLocation="http://www.w3.org/2000/10/XMLSchema
          http://www.w3.org/2000/10/XMLSchema.xsd"
          elementFormDefault="qualified"
        >
     <element name="db_bean">
        <complexType>
               <annotation>
                    <documentation></documentation>
               </annotation>
               <sequence>
                    <element name="property" minOccurs="0" maxOccurs
="unbounded" >
                         <complexType>
                              <choice>
                                   <element name="java.lang.Boolean" type
="boolean" />
                                   <element name="java.lang.Byte" type
="byte" />
                                   <element name="java.sql.Date"  >
                                         <complexType>
                                              <simpleContent>
                                                   <extension base="date" >
                                                        <attribute name
="pattern" type="string" use="fixed" value="yyyy-MM-dd" />
                                                   </extension>
                                              </simpleContent>
                                         </complexType>
                                   </element>
                                   <element name="java.lang.Double" type
="double" />
                                   <element name="java.lang.Float" type
="float" />
                                   <element name="java.lang.Integer" type
="integer" />
                                   <element name="java.lang.Long" type
="long" />
                                   <element name="java.lang.Short" type
="short" />
                                   <element name="java.lang.String" type
="string" />
                                   <element name="java.sql.Time" >
                                         <complexType>
                                              <simpleContent>
                                                   <extension base="time" >
                                                        <attribute name
="pattern" type="string" use="fixed" value="yyyy-MM-ddHH:mm:ss.SS0" />
                                                        <attribute name
="zero_epoch" type="string" use="fixed" value="1970-01-01" />
                                                   </extension>
                                              </simpleContent>
                                         </complexType>
                                   </element>
                                   <element name="java.sql.Timestamp"  >
                                         <complexType>
                                              <simpleContent>
                                                   <extension base
="timeInstant" >
                                                        <attribute name
="pattern" type="string" use="fixed" value="yyyy-MM-ddTHH:mm:ss-SS-00" />
                                                   </extension>
                                              </simpleContent>
                                         </complexType>
                                   </element>
                              </choice>
                              <attribute name="name" use="required" >
                                   <simpleType>
                                         <restriction base="string" >
                                              <pattern value="[a-z|A-Z|_]
[\w|_]*" >
                                                   <annotation>

<documentation>java_names must follow Java class naming rules: the first
character must be a letter or '_'; the characters that follow may be
letters, '_', or numbers</documentation>
                                                   </annotation>
                                              </pattern>
                                         </restriction>
                                   </simpleType>
                              </attribute>
                         </complexType>
                    </element>
               </sequence>
               <attribute name="class" use="required" >
                    <simpleType>
                         <restriction base="string" >
                              <pattern value="[a-z|A-Z|_][\w|_|.]*" >
                                   <annotation>
                                         <documentation>java_names must
follow Java class naming rules: the first character must be a letter or '
_'; the characters that follow may be letters, '_', or numbers. Periods can
be used for package delimitation: ie com.vencast.SomeClass</documentation>
                                   </annotation>
                              </pattern>
                         </restriction>
                    </simpleType>
               </attribute>
          </complexType>
     </element>
</schema>