Bind command-space?

Hey there. I just recently started using a mac for my new job. I would really like to be able to bind command-space to a command in a certain application. (IntelliJ)

It doesn't seem to work, though. I realize that command-space is bound to Spotlight by default. I have changed that binding, though, and even unbound Spotlight entirely, but the application still doesn't seem to recognize that command-space is being pressed when I try to bind it. Anything I might do to force this to work?

I am on Snow Leopard.

(Sorry if this is not the right place to be asking this question or if it's already answered somewhere else. I spent a fair amount of time trying to search for the answer before posting this thread.)