Wolverine portable hardrive no longer recognized

Hi there,
I have a brand new Wolverine 40gb flash pac which I had been using for a week with out problems. Straight out of the box - plug and play.
But all of a sudden tonight when I connect the pac to my MacBook Pro with the usb cable, the drive icon doesn't show up on the desktop. I tried conecting to the usb port on the other side of the Mac, used a different usb cable, pushed the reset button on the flash pac, but nothing seems to make it work EXCEPT if I shut down the Mac and restart. I can then plug in the flash pac and the icon showed up once on my desktop, but if I turn it off and try to restart the flash pac, the icon fails to appear. What gives!!
I also noticed that my other usb card-reader also no longer is recognized by the Mac. Coincidence? I don't think so. The only thing I did differently tonight is transfer images from a brand-new 2gb SD card onto the flash pac. Problems occured immediately after this transfer. Could the SD card have been "defective" and be the source of my woes?
My laptop fan runs on the usb port, so I believe the port has juice.
THANKS!!
rt
macbook pro 15.4"   Mac OS X (10.4.8)  

I'm answering my own question, but hope it may be of some help to others who find themselves in the same situation with an intermittent mounting external harddrive.
After resetting SMU, repairing permissions, and still having problems mounting my portable wolverine, I went to the Apple Store, explained the issue and left the laptop there after the Genius on duty tried a few things unsuccessfully.
A few hours later I got a call from another Genius who figured out what was going on. Apparently for some reason my MacBook was "confused" and still thought it was mounted to the Wolverine harddrive even if the usb cable was disconnected.
The Genius said all he did to fix it was to "clear out the cache". And now the Wolverine works flawlessly again, and the wolverine icon appears on the desk top when I attach the usb cord. The genius suggested that I might have forgotten to drag the drive icon into the trash that night before yanking the cord.
Anyway, here is a brief instruction on how to fix this problem:
Go menu - go to folder - type: /volumes - drag the "alias volverine" volume to the trash.
And that's it! Works like a charm now. Thank you Apple Store and Genius Bar!! Great job!
rt

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