Solidworks Activation Error Message

Hello I came upon a problem while using Solidworks 2011-2012 student edition on my Windows 7 64 bit computer. I have been using Solidworks for about 6 months now on our 1 year license and now every time I open Solidworks it asks me to activate it. I believe I activated Solidworks when I opened it the first time. When I try activating both online and by email and both give me an error message. Does anyone here know what my problem might be so I can continue cadding for my team?