NXCAM and CS4

Any suggestions how I get NXCAM 1920x1080 from a Sony NX5 to work in Premiere CS4? Video is conformed okay, but all I get for the audio track is literally white noise.

The footage plays okay in the clip browser, but not in CS4.

I tried delinking the audio from an mpeg 720x576 stream and then linked that with the HD vision footage, but the footage differs by 10 frames when placed on the time line.

Intel i7 920, 12GB RAM, ASUS P6T, Vegas Pro 10 (X64), Vista x64 Ultimate, Vegas Production Assistant 1.0, VASST Ultimate S 4.1