hi guys

I've got a Kenwood DPX503u HU and KCA-BT200 parrot kit. I can pair my phone with it (nokia 6700 classic) i can ring people and people can ring me, i can hear them through the car speakers, but they cannot hear me, i thought it was mic, so i bought another cheap mic off ebay but i still have the issue, can anyone shed any light of what i should do next. Any help appreciated.