Community Tip - When posting, your subject should be specific and summarize your question. Here are some additional tips on asking a great question. X
You may want to get an up to date license number from here: http://www.ptc.com/communities/academic-program/products/free-software
And then reinstall the license using reconfigure.exe (located in C:\Program Files\PTC\Creo 3.0\M040\Parametric\bin)
This worked for me.