GPS Navigation Troubles

I was hoping you guys could help me with a problem that has been driving me crazy every since I bought my Bimmer, a 2000 323i. I bought the GPS Nav option, actually, it's one of the main reasons I bought the car. I am unbelievably disappointed with bimmer's GPS system. That being said...at least once a road trip, the system appears to lock up. When I push the button to switch between GPS Nav and the onboard computer, it jumps right back to the radio or onboard computer, which ever I was using. If I hit the menu button, the systems goes blank and then resets itself. It keeps my destination in, but it no longer gives directions, I have to select directions again. This almost always happens when I use the radio controls (Change radio station, ff rw a tape, etc...). Anyone that can help, please respond or send me an email.
Thanks

man that never happened to me what year is the car??? if it is new or three years old or less take it to bmw they'll fix it free hell they changesd my headlights free because i said they were not bright enough!!!

:cyclops:
do you have a button in your system that switches between gps, radio and cd functions? you may be triying to control your system in the wrong setting. my gps system, although aftermarket, includes a cd payer and tuner along with a dvd player, and all of the above have remote functions, but you must be in the proper remote setting. hope you resolve your problem. good luck. :D