I just came back from a garage sale, and I bought a Keystone Everlash XR308 (110 film) camera, and I would like to know, how is it supposed to work? When there is no film I can use the flash (by sliding the metal part), but with the film it doesn't work. It might be that the film is at the end of the roll (because all I see is light brown). Is there anything I should know about this camera (where to buy film, extra info, etc)?