Are all SGS phones able to detect a car dock?

I have a Samsung Galaxy S I-9000 (the international version) and I have a car dock manufactured by Samsung for this phone (given to me by the Samsung representative who works with my cellphone provider, so I have good reason to believe it's the real thing). I know that most car docks have a magnet that the phone uses to detect that it's been docked. Mine seems to have one because when the phone is docked, the magnetic compass always points north, and when it's not docked, the compass points in the right direction (I checked this using Car Dashboard , which uses the internal compass when the phone isn't moving). The problem is, my phone does not seem to detect that the phone is docked. I have some triggers in AutomateIt for when the car is docked, as well as in Car Dashboard , and they don't seem to work. The question is, should me phone detect the car dock? How can I check this? If it should, but doesn't, how can I troubleshoot it?