EXTERNAL USB Drive will not open with Snow Leopard

External USB drive will open with SL. The drive icon appears on the desktop. When I click on it, Error message, "The alias USB Drive can't be opened because the original item can't be found." When I click on "Fix Alias", a window pops up and shows the usb drive in a list but does not respond when I click on it. I then tried disk utility and tested the disk and it tested OK. The drive still will not open. This problem started after I installed Snow Leopard. Need Help.
Message was edited by: PHAT ROB

The same error is produced when I try to mount a smb share.
I select the "connect to server" (cmd-K). Input the share info "smb://<user>@<server>/<share_path>
At the auth prompt, I input my credentials.
The error pops up, same as original poster.

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