Does Windows recognize the camera? What other firewire devices are connected?
To add to Harm's question: I have CS4 and a RME Fireface 400 FireWire sound card. My Canon HV30 and the RME will not play well in PP CS4. My options are to capture in PE or use the onboard sound card when capturing video in PP (you can have multiple sound cards and have one default card as well as other cards specified for various programs). There are other 3rd party capture programs as well. A Mac user friend of mine uses a different capture system as well. I agree with your frustration - I prefer to capture in PP.
Lloyd, thanks for this remark. It reminded me that the OP can try capturing with HDVSplit, which is a much better capture tool than PR because it accepts cameras more easily, it allows scene detection and avoids the risc of out-of-sync issues.