I recently bought a Canon Digital Rebel 300D on Ebay. it worked fine for a few weeks and then one day I took out the CF card to see what kind it was so I could buy another one, and when I tried to put it back in it wouldn't fit. I tried and tried and finally gave up and figured I'd wait till the one I ordered got there. Well I got my new CF card in the mail today and it went in but when I turn the camera on, "Err 02" blinks on the screen. What could be the problem? I have the right kind of CF card so that's not it.