Editing GUI removes mouse look

Whenever I modify the GUI in any torque game, I loose the mouse control for looking around in both 1st and 3rd person and the mouse button remains on top. Before editing the GUI it works as it should but then adding, changing or deleting anything in the GUI editor and then restarting the game removes control and shows the cursor.

I can however look around by holding right mouse button when in Mission Editor like normal. I have tried with many different torque games (starter.fps, tutorial.base and my own mods) and they all react the same. I have also tried re-installing Torque many times without success.

Does anybody have any idea of what is causing the problem or what I am doing wrong?
Any sort of help would be appreciated, because of the importance of being able to change the interface.

Thanks,
Max