Can call by headset only!

[dhild]

I have had my 6700 for 2 months now and all of a sudden i cannot make or receive calls without a headset, nor can i listen to music out of the speaker. I know that it is not the speaker because the phone will still ring. When I receive a call, the phone rings but when i answer i can hear nothing and the other party can't hear me. Has anyone else had this problem? Thanks!