Zboard

I had the same problems as you and found this answer on blizzard forums.



First, the disc that comes with your ZBoard is now too old to use. The drivers on the disc were made by Ideazon before Steelseries took over, whereas the WotLK keyset was made afterwards. Steelseries seem to have completely reworked the drivers in the interim.

How to Fix
Step 1. Uninstall your ZBoard.
Step 2. Go to http://www.steelseries.com/downloads/#keyboards and DL the Z Engine.
Step 3. Make sure your ZBoard is plugged in with the standard keyset.
Step 4. Install the new Z Engine.
Step 5. Switch to your WotLK keyset.
Step 6. Run WoW.

I used this solution last night with some success.
Most of the gamer keys now work but some still don't work correctly such as, all the chat buttons default to say.
Hope this helps