Thanks Fabian, it works.

I had done something like this before with
remotely checking diskspace. I was thought that I didnt need admin privileges.
I should have checked! I've learned my lesson
and want to thank you very much for your help.

Some users where the dll isn't installed
are having problems, so I wanted to check
the 120 workstations for that dll.

If it's not there I'm going to install it.