External HDs, Digi002 suddenly not recognized by Mac Pro or G5

I have a very strange problem that I have not seen on any of the forums. Neither of my two Macs, a G5 or a newly purchased Mac Pro, recognize any of my external hard drives or Digi002, which is a controller used by Pro Tools. I have changed the ports, cables, everything. None of them will mount or be recognized by either computer. They do not show up in Disk Utilities or System Profiler.
Neither of my two Macs, a G5 or a newly purchased Mac Pro (I just purchased this today), recognize any of my external hard drives or Digi002, which is a controller used by Pro Tools. I have changed the ports, cables, everything. None of them will mount or be recognized by either computer. They do not show up in Disk Utilities or System Profiler.
All of the five external HDs I own, the external DVD burner, and Digi002 stopped mounting/being recognized on my G5. I needed to upgrade my computer anyway, so I purchased a Mac Pro. None of the above are recognized by the Mac Pro either.
I have tried FW400, FW800, and USB slots in both computers, and none of them will mount or be recognized.
Interestingly, all three of my USB drives mount in the USB ports that will not show any of my external HDs.
_*G5 (OS10.5.8, G5 PowerMac7,2, 4G RAM):*_
- None of the four external drives or Digi002 (FW400 connection) shows up. This does not matter whether it is USB, FW400, or FW800. Only USB drives show up.
_*Mac Pro (OS10.6.6, MacPro1,1, 4G RAM)*_
- None of the external drives or Digi002 (FW400 connection) shows up. This does not matter whether it is USB, FW400, or FW800. Only USB drives show up.
- I cannot get iTunes to play through the 1/8" output.
- Pro Tools 9.0.0 does not have input/output, and of course, does not recognize Digi002.
Thanks for any help you can give.
Message was edited by: elevenshadows

Your new Mac Pro, by default, boots 64-bit kernel mode; requires 64-bit drivers or you will need to switch to 32-bit mode. At least to test.
Non-system drives are best formatted with the latest OS; and use GUID rather than Apple Partition Map.
Between a new Mac, new OS and all the changes, try a very simple approach.
Also, hope that you didn't migrate / import or use Setup to bring applications over to the Mac Pro; and don't use the G5 drives until you can reformat those to GUID.
http://discussions.apple.com/thread.jspa?threadID=435350
http://macperformanceguide.com/SettingUp-Kernel64.html

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