Enter/backspace/escape not being sent

I am running into a very strange problem when I try to play WoW using ISBoxer - I can log in just fine (as in, backspace, tab, enter, escape) all work just fine when I am at the login screens, but the instant I load into the game, all special keys like that stop working entirely.

When I launch WoW without IS it works fine, but with IS none of my keys work.

Any ideas?

Purely guessing, but you might have mapped keys which have those keys as hotkeys.

Can you use those keys, when Keymaps are turned off?

It turns out the problem was Jamba, not ISBoxer - turning off Jamba Macro, Jamba Quest and Jamba Quest Watcher did the trick.