Inventor 9 errors

[mdjsman]

I just loaded service pack 4 yesterday and now when I am in sketch mode, general dimension does not recognize sketch entities in the sketch but does recognize entities in other sketch planes. Also when I attempt to put a sketch plane onto a work plane the program does not recognize the handles on the work plane so I cannot sketch off the planes I need to. Could this be an issue with the service pack, or could it be a video driver issue. Before the updates everything was working properly

Thanks,
Mark Johnson