I'm trying to get the following scipt to work, but I'm getting an error because of the permissions. Can anyone tell me what I'm doing wrong?

code:
setl "SU_COMMANDLINE=Power.com"
setl "SU_USERNAME=admin"
setl "SU_PASSWORD=password"
Shell su.exe

The power.com is just a bat file I converted to a COM file. The command adds user/groups to local groups on a 2000 workstation. power.com needs to run with Administrative rights so I am using the local admin account on the computer.