Limiting Concurent Login

Hi 🙂
We’ve just migrated to server 2003 and is trying to use this Microsoft free tool called LimitLogin that can assist with restricting users from loggin into more than 1 workstation.

The IIS piece installed just fine but when we tried to install the AD piece it keeps coming back with 401 error. I’ve check all of my permission on IIS but nothing works.

Does anyone have any suggesstions? Thanks so much.