The default for target next enemy is the tab key.
Maybe you need to restore the defaults and start over? 
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The default for target next enemy is the tab key.
Maybe you need to restore the defaults and start over?
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"/unbind tab" should set it back to it's original server default.
Then log out (to desktop) without zoning. That should force the bind to save.
Then open the client and log back in.
Test it. Zone. Test it again. Enjoy.
Ok I keep setting my target next enemy to tab but it randomly resets itself to nothing again and I have to go back in and set it to tab again anyone know why?