XSLT - DTD Issue

[Jay Hotaling]

Hello,
We have been unable to transform an xml document that references a dtd. The xml doc has the following:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE PERSON_RESPONSE SYSTEM "response.dtd">
.
.
.
I can parse the xml doc no problem (using an entity resolver to resolce the DTD).
The DTD and XSL files are in the same package as the java class that parses/transforms.
I'm running WSAD 4.0 and using the latest XERCES/XALAN from Apache.
Any help or suggestions would be greatly appreciated!