External Hard drive not reading after 10.3.9 update

Hi there and thank you for this forum. I am wondering if anyone can help me through this maze of confusion...I have just recently upgraded from 10.3.5 to 10.3.9 and now I cannot access my external Fantom Drive. Both of the USB ports can read other devices, and also I can still read the Fantom from a PC, but when I plug it into my ibook, I get nothing.
Can anyone recommend anything? Can I reinstall the original 10.3.5 software and be done with updates? The Fantom is not supposed to be affected by the 10.3.9 system, so I don't know what happened, but I can tell you that the only 2 times I have updated this mac, I have had serious problems! I won't be updating anymore!!!
Thanks mates...

You're welcome.....and thanks for acknowledging me in your post....
I'm sure you would have thought of this workaround sooner or later....After 2 reinstalls of OSX this was my last resort.

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