I had a similar problem at first.. I was so used to using my mouse buttons on my G7 mouse that when i started mboxing and wanted my clones to do the same I couldn't understand why it wasn't working.. at first i tried the mousemapping too.. but i couldn't get it to recognise the mouseclicks when i was hovering over the field

I gave up on it for a while.. but then it hit me! I had the logitech software change the button to something else .. ctrl+something or other putting them back to the original allowed keyclone to register the command and still keep the keybindings in wow

come to think of it tho.. I set the logitech software up so it would be ctrl+0 and yet i would expect that command to cross over to my clones no matter if i had mousemapping on or not :S strange

hope that helps in some way