PowerPoint Problem On Mac... Please Help!

Hello

I am having a PowerPoint problem on Mac:

When I connect my Macbook Pro to the projector by a VGA cable and I set the PowerPoint as a full screen it works on Mac but on the projector what's show on the laptop it's shown on the projector but small in the left side and a counter like the quicktime and the time increasing and some other icos that are only in Mac like the close and minimize and other things

so why am I facing like that? and how can I solve this issue to show the full screen from the laptop on the projector?

BTW I am using Mac OS X snow leopard

Please help me as fast as you can because it's kind of urgent

Thanks