Nokia N95

Just got the Pioneer DEH-P700BT for my car and I have been having a problem with the bluetooth. When I first pair my Nokia N95 it work fine execpet that I can not download my contacts. Once I shut of my car and try to reconnect the phone will flash connected then disconnected. I can not get it to stay connect after the first time I pair it. I think I have tried ever differt setting on both the phone and the head unit. Please help me it is getting on my nerves have to delete and repair it ever time I turn my car no then off.