Firewire 800 drive dismounts itself after awakening from sleep mode

I have a 24" intel iMac ( running V10.4.10) with a FW800 Western Digital 500 GB attached - about half the time when it wakes up from a sleep the drive is removed from the desktop and I get the "improper removal" dialogue box. I called WD's help line and the best they could think of was send it back - other than what I've stated the drive works fine - ANYBODY got any ideas brighter than that??
PS: There 1st bright idea was to not plug it into a power strip but use the wall outlet - I did but was of no help.
APZ

Hello IllinoisMike. Welcome to the Apple Discussions!
Please try the following:
1. Delete Preferred Network(s)
o System Preferences > Network > AirPort > Configure
o In the "By default, join:" pull-down menu, select "Preferred networks"
o Delete the network(s) you regularly use from the list
2. Delete AirPort Keychain Entries
o Launch the "Keychain Access" application located in Applications/Utilties.
o Click on the "Kind" filter at the top, and look for any "AirPort network password" entries...and delete them.
o Restart, or log out then back in.
3. Add Preferred Network(s)
o System Preferences > Network > AirPort > Configure
o In the "By default, join:" pull-down menu, select "Preferred networks"
o Add the preferred network(s) using the "+" button.
o Restart or log out then back in.

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