What Windows NT service pack do you have installed?

>I just used VFP 7 and InstallShield Express for the first time. I created an installation that works on my machine [Win98SE], and can run on another machine. But when I try to install it on an NT server, it apears to gets about 99% complete, then just sits there doing nothing. After I terminate it, no files appears to have been installed. Running from the server console with an admin account. Tried two more times - same problem.