Error Opening Inventor 7.0 SP1 Files in SW 2008 SP 2.0

We are transitioning from Inventor 7 to SW 2008. I cannotopen any *.ipt files from Inventor in SW08. Any suggestions?

Solidworks just locks up and blows out, I have to restart SW everytime. We are running XP not Vista.

ScottSolidworksParts And Features