Camera Doesn't Connect (USB)

I have a digital camera (Sony DSC) that sports a USB port for transferring photos. I approached my first try with trepidation but, to my surprise, it connected, SuSE Linux 9.0 recognized it, and an icon showed up on the Gnome desktop. I easily transferred photos to a Linux folder. Then... A couple of weeks later, today, I connected my camera to transfer some photos and... nothing happened. No matter what I tried, I couldn't get Linux to recognize the camera. My problem now is that I don't know how to proceed. Is there a command somewhere that might give me some insight into the problem? Any advice appreciated. Don Henson