Framework Permission Issue

I am using the QTJava.zip framework, so that I can do image resizing 
from within my application... now I have it working just fine on my Dev 
and Production boxes, but I keep getting an exception on my test 
server.  As long as it works on Production I am happy, but the fact 
that it doesn't work on all is annoying to me...  This is the error 
that I get:

  com.webobjects.foundation.NSForwardException [java.lang.InternalError] 
Can't connect to window server - not enough permissions.

The permissions are set the same on the framework file for each box... 
and the file itself is located at 
/System/Library/Java/Extensions/QTJava.zip

I am not familiar with this error, and was wondering if anyone could 
give me any ideas what the problem might be, thanks!

-Dave