Error in displaying XML

["SETH,MANOJ (HP-India,ex2)" <manoj.seth@hp.com>]

Hi..
 I m getting this error when I try to display maintlf.xml on IE browser - 

Required white space was missing. Error processing resource
'file:///C:/ccm_wa/PHOENIX~PHOENIX_PHASE1_smanoj_win32/PHOENIX/config/code/x
mlconfig/test/maintlf.dtd'. Line 12, Position 18 

<!ELEMENT include>


Here is maintlf.xml - 
<?xml version='1.0'?>
<!DOCTYPE Server SYSTEM "maintlf.dtd">
<Server name= "ser" xmlns:xi="http://www.w3.org/2001/XInclude";>
	
	<Subsystem name="tlf">
		<include href="tlf.xml"/>
	</Subsystem>
	<Subsystem name="scheduler">
		<include href="scheduler.xml"/>
	</Subsystem>
	
</Server>

And here is maintlf.dtd - 
<!ELEMENT Server (Subsystem*)>
<!ATTLIST Server
  xmlns:name      CDATA           #REQUIRED
  xmlns:xi        CDATA           #FIXED "http://www.w3.org/2001/XInclude";
  >

<!ELEMENT Subsystem (include)>
<!ATTLIST Subsystem
  name            CDATA           #REQUIRED
  >
  
<!ELEMENT include>
<!ATTLIST include
  href            CDATA           #REQUIRED
  >


Cud anyone tell me whats the error I m making here...
Thanks in advance,
Manoj