I am sooty - but we are not mind readers...
What ARE you trying to do? Are you trying to restore to iOS 5.0.1 or trying to load it initially. Are you restoring a jail broken iPad or was it stock. How did you attempt the restore, on the iPad or through iTunes. Where is the error appearing, on you computer (Windows or Mac?) or on the iPad. What is the behavior of the iPad at this moment - does it work? Do you see only the Apple logo?
As you, hopefully, can now tell - we need a lot of information. My list of questions doesn't even begin to scratch the surface. Please write down everything that's happened and what you've done up to this point so we can attempt to help.
Until we get more info, I'm sorry but no one can, or will, respond.
Marilyn