HELP !!! PLS - Computer Hangs

I'm using VB6 and a tool called the VSFlex Grid which is based on the MS Flexgrid. I have a user who runs my program on Windows XP home edition. He says that it is a new computer and every time he hit his 'TAB' key on certian screen the program hangs with no error and he gets the program not responding and have to shut down his computer. Could this be because it is Home edition.

I'm not sure if this has anything to do with the VS flexgrid
Chris

might aswell be his graphics card not behaving... tell him to shut off hardware acc. and try again... just a shot in the dark, but its all I can suggest :)