Nokia 6600 slide keys not working

I've only hadthis phone a couple of weeks now and last night when I turned the phone off it was fine, however when I turned it on this morning I found that some keys don' twork. The only keys that do work is the power button (just about) so I cn barely turn it off and on and all of the number keys work fine.

I can no longer access the menu or do anything other than turn it on/off and type in numbers (It won't let me call anyone once i've typed in the numbers though)

I was wondering if there are any solutions to this problem, it annoys me as I have only had the phone a couple of weeks.

Thanks in advance