Error while using chiba with Weblogic

Hi ,

I am trying to run xhtml samples using
chiba on  weblogic 8.1 . 
I am getting this error consistently

org.chiba.xml.xforms.exception.XFormsException: could not create document container

java.lang.IllegalArgumentException: PAR003 Class, "org.chiba.xml.xforms.XFormsDocument", not found.
org.chiba.xml.xforms.XFormsDocument

Is chiba supported on weblogic . If
yes what version of weblogic is supported and are there any specific steps
to be followed while installing chiba on weblogic.

Please reply as soon as possible.

Thanks & Regards,
Surabhi