I have a canon 50 d that is only 2 months old. I have been having trouble when using it in auto that the flash will not pop up, and in the image produced is all black. Also when I go into av or the other modes it does the same thing. I am getting only black images, and if the flash does pop up when I manually push the button, the image is still very dark. Any suggestions? I am so frustrated b/c this is a virtually brand new camera!