If your installations are asking for activation, then you accidentally installed your product as a stand-alone version. Unfortunately, you need to reinstall as a network version. Unless you specifically configure the deployment to be a network install, it will install as a stand-alone. You will then have to uninstall the clients and reinstall the network version. Annoying, I know.
Also, your 2010 licenses will work fine on the 11.5 version.
Sorry for the lack of timely response. Been very busy this week. Good luck with this!
I recently just got AutoCad 2010, however when I'm activating it and type in the request code that is given to me it gives me an error message. Any advice?
The request code is provided to Autodesk. Autodesk then provides you with an activation code. Call 1-800-551-1490 and give them your serial number and request code. They will help you activate you product.