Need to know the format of file path in build.xml - webhelp

Hi webhelp devs :

I follow the "Generating webhelp output"[1] and I got an error when following step 6, part b.
Before that I successfully created a webhelp output by putting input xml file inside the webhelp-xsl folder (DocBook/docbook-xsl-1.76.1/webhelp/).

But when I go to build it in another directory I got this problem.
I configured build.xml file as in step 6, part a. 

<project>
  <property name="input-xml" value="/home/gihan/Installed-Programes/Programming/DocBook/My files/test.xml"/>
  <property name="output-dir" value="/home/gihan/Installed-Programes/Programming/DocBook/My files/webout"/>
  <import file="/home/gihan/Installed-Programes/Programming/DocBook/docbook-xsl-1.76.1/webhelp/build.xml"/>
</project>

Here I put my input file test.xml in directory which called as 'My files'. So I got following error when I run the command "ant webhelp";

Buildfile: /home/gihan/Installed-Programes/Programming/DocBook/My files/build.xmlvalidate:
BUILD FAILED/home/gihan/Installed-Programes/Programming/DocBook/docbook-xsl-1.76.1/webhelp/build.xml:23: Could not validate document /home/gihan/Installed-Programes/Programming/DocBook/My files/test.xml
Total time: 6 minutes 30 seconds

If I didn't configure build.xml file properly, please correct me !.

[1]. http://docbook.sourceforge.net/release/xsl/current/webhelp/docs/content/ch02s01.html

-- 
Regards
Gihan Chanuka Karunarathne

Department of Computer Science and Engineering

University of Moratuwa

Sri Lanka

Twitter: https://twitter.com/#!/gihanchanuka

LinkedIn: http://lk.linkedin.com/pub/gihan-karunarathne/25/ba3/993