Digital camera connection problem

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http://crunchbang.org – I am having trouble connecting a Canon DSLR in CrunchBang. When I plug the camera in to the computer with the USB cable, nothing happens--it does not detect it like it does with a USB flash drive. I check the File Manager and no "camera/drive" is displayed. I tried gphoto2 in the terminal and it can detect the camera but has an error trying to connect to it. I tried darktable and Rawstudio--darktable freezes when scanning for devices, but it can detect the camera in its open dialog when choosing to load images--however, then the same thing, it has error when trying to connect. And ag (HowTos)