What version of JBoss Fuse do you use?
And do you have the transforms/Employee.xsl included in the JAR of your Camel application?
There is a bug loading resources on classpath on Windows.
It has since been fixed.
320501-Author: Claus Ibsen <firstname.lastname@example.org>
320544-Date: Thu Mar 14 17:16:05 2013 +0000
320584: xslt component has problem loading resource from classpath on windows.