Sorry can't help you more as I can not open the scene file. However I can tell you both jpeg and bmp are not good image formats to be working with. Try iff, tiff, tga, sgi or openEXR if your rendering out pass data.
Best of luck with it.
Dave 
From a readers' Q and A column in TV GUIDE: "If we get involved in a nuclear war, would the electromagnetic pulses from exploding bombs damage my videotapes?"