Motorola Droid MUTES while talking

[shotzid]

I have a Motorola Droid and every time I hold the phone on my shoulder when talking to someone they can't hear me. I can hear them. At first I thought I had accidently hit the mute button but that was not the case. Then I thought while talking to someone I would put the phone on the home page while talking. And that didn't work. It is so frustrating. Does anyone else have this problem? What to do?