PMDG 737NGX View Problems

I have just found myself running into a very annoying issue, i was preparing for a short flight and once the FMC was done i was in VC mode panning around the flight deck checking and switching stuff on etc and then all of a sudden i couldn't pan around anymore in ANY view, i couldn't zoom out or in nothing at all...its almost like the aircraft had crashed on me but the simulator was still running perfectly fine for sometime before i had to just give up and restart! Ive never had a problem with the plane or this matter before...any suggestions?