720p60 P2/HD Dropped Frame Issue

I'm having a dropped frame issue in FCP with some P2 720-60p footage. I can't get it to play through a sequence without freezing and giving me a warning. We've narrowed it down to an apparent processor issue. There are two tracks of audio (a stereo pair), and two tracks of music (again, a stereo pair). When we turn off the music, the sequence plays fine. But when the music goes back on, the sequence chokes. The funny thing is, I just did an HD project shot in 24p/n with several tracks of audio and several tracks of video and, aside from needing to render certain things, it played fine.
Any ideas?
Here are the specs:
P2 footage originated in 720/60p
AUDIO/VIDEO SETTINGS:
Sequence Preset: DVCPro HD 720p60
Video Playback: None (there isn't an output card for this computer).
SEQUENCE SETINGS:
Frame Size: 960x720 (HD 960x720 16:9)
Pixel Aspect Ratio: HD (960x720)
Editing Timebase: 59.94
Compressor: DVCPro HD 720p60
Audio Rate: 48 kHz
Depth: 24
Config: Default
Any ideas here?
Thanks,
Tim Walton
KVIE Public Television

Then it's pointing at a throughput problem between the RAID and the server I'll guess. Trouble shooting that could be interesting. Can you move the media to a local drive?
I'd also be interested to see what AJA's read/write speeds are on that RAID from your station...
Post the gear between your mac and the server etc.. whose RAID is it, How is it formatted? Got a model number of each of the devices involved? Mac Server?
Jerry
You've selected the "Easy setup" for the format you're editing too, right?

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