Does anyone ever have problems dialing out w/ bluetooth? About 25% of the time when I choose a number to dial from the phone, it does not 'connect' with my stereo.

My phone is dialing and I know I am connected b/c people have told me that I called but they could not hear me. Usually the stereo turns off and it goes into phone mode when I dial, but about 25% of the time it does not and I cannot use the actual phone or the stereo system so I am in limbo. The stereo continues to play music or whatever like normal and my phone is connected.

I used to have a Razr w/ T-Mobile, and now I have a Sprint/Nextel phone and it has happened on both phones.

Any ideas?