Can I use a .bat file as a logoff script in Terminal Server 2003

I configured a .bat file to write a users name, computername and time to a log file. I set this .bat file to run with gpedit.msc on a terminal server (server 2003 sp1)to run at logon and logoff. The users are power user. The script will run for the logon but will not run for the logoff unless I give them administrator rights.

Is there something that I am missing configuring the Group Policy?

I don’t use AD since we use edirectory and Netware/SLES

Thanks for the help