Help needed on SecurityException

Hi,
I have a servlet that is working on JRUN 2.0. We use XSLTransformEngine to 
generate HTML document from XML and XSL files.  Recently, I upgraded the 
application to JRUN 3.01.  But the servlet is failing with an Exception 
"SecurityException: Sealing Violation".  This exception is caught when I am 
converting the XML to HTML using XSLTTransformEngine.  How do I overcome 
this?  I am using javax classes for the TransformEngine.

I highly appreciate you help regarding this.

thanks
Satya Alapati