Default Problems Bluetooth and CM7

Hi.I have a HTC Legend with CM7 7.1.0 before i have 7.0.3 and before i have the stock Froyo "vodafone" my problem is the bluetooth i have a new car "Seat" and this car have a Multimedia system incorporated "Seat Media System 2.2"
the car has a hands-free system and my phone and the phone and mobile numbers synchronizes good... But when i use the voice control for example"Call to James" the car says "Calling to James" the voice control not working and the car says in the screen "Can not perform the operation" The problem appeared with CM7 because when I use Stock Froyo the control voice worked perfectly and all worked perfectly
Anyone know what could it be? It can Be problem of Cyanogen???

Sorry for my bad English Thanks!!!!