[xwiki-users] code problem

Hello, I have the problem that {code} #set($e = "Hello") {code} displays only the gray codebox, but not the code itself. The code is nevertheless not executed. So when I call $e it has not the value "Hello". I am running the same xwiki installation on two computers, one for testing (everything works fine) the other running. I search every file for possible changes but could not find one. The only difference between the two is the Tomcat version. Thanks in advice