Problem with tablet pc with blender (Rotateflag)

I’m using the HP TX2000 series tablet PC downgraded from vista to xp. Using Blender 2.47

To use the pivot button, i have to set rotateflag to 0x40 (64)

But by doing so, if i key in any commands, i need to move my mouse a little so that the popup will appear, like x to delete all will only appear when i move my mouse. same goes for the top menu.

Anybody have any idea how to solve this? would like to have the pivot function and also use blender as per usual.