How do I access the next month shortcut key in Ical?, How do I access the next month shortcut key in Ical?

I'm using mac lion, and somehow have it configured so that when I press Command+next arrow, the system navigates to the next desktop. I'd like to be able to access Next month from within ical. Is there a way to change the default keys in ical, to change the default next month key stroke? Or is there a way to change the preference for desktop switching from within system preferences? Thanks.