QTR-Quadtone RIP

We are currently experiencing a problem installing the QTR on a group of computers in our 
lab. We are running Windows XP.

The 'curve creation' box was selected during installation.

When logged on as Administrator there is no problem....'curve creation' is accessable under 
tools .

When students log on 'correction curve' is grayed-out.

Does anyone know how (or if) QTR can be set-up to work on a network with student access?

We are able to access the usual profiles, etc. and make prints with the cool, warm, sepia 
settings....it's just that we have no access to 'curve creation'..... it's grayed-out.

Any suggestions appreciated!

Thanks!

Jeff