Problems with XSLT 2.0

Hi,
I am writing code by specifying the version in xslt as 1.0 . Now I want to
use user defined functions
in xslt. For that I am specifying the Version as 2.0 But while running the
java program using eclipse it is throwing
exceptions.
What are the changes to be made to the eclipse like including any jar files
for xslt2.0.
if that is the case, specify where can i get the jar files.

Thanks,
Laxmi Narayana