Whaaaaat? ???
When you enter "wpmenu" in the console, nothing happens?
Or can you try putting this into your config.cfg:
bind "[key]" "wpmenu",
where [key] is any key you'd like to press in game to make the menu appear (be careful not to bind one and the same key twice!). Then, when you have started a game and are running around a map, you ought to be able to get the WP menu to show up.