Iphone sync problems with 2008 X5

[bsk997]

Hi Guys,
I have a 2008 BMW X5 4.8i with the bluetooth package and I'm having troubles with my Iphone 3Gs and was wondering if anybody else had the same problem.

It worked awhile ago but it stopped working when they upgraded the software in the X5.
Right now, it will pair up fine and sync the address book. It'll dial or receive calls ok but as soon as the call is picked up, the other person can't hear my voice. I can hear them fine though.

I've asked the SA numerous times and they said it was a problem with the iPhone. I've searched this forum as well as the e90post forums and haven't found anybody else having the problems. Is the SA just making up BS cause I've asked him 3-4 times now and he says the same damn thing...it's the Iphone and BMW not syncing right. It's the iphone's fault since all other phones work.

Any input would be greatly appreciated!
Thanks!