Car Dock Speaker Phone Annoyance

[bm652]

I have a Bluetooth enabled stereo in my car and use it all the time for listening to streamed music and make phone calls from my fascinate.  The Bluetooth phone calling works great when the phone is sat beside me on the passenger seat, however as soon as I put the phone in the car dock, the phone automatically turns to speaker phone and refuses to use the Bluetooth connection.  This is extremely annoying.  Is there a way to disable this default action? 

[VZW_Zrock02]

Unfortunately this is how the device is programmed for when it comes into contact with the dock. At this time there is no way to disable it.