When you select use all lights do you actually have lights in the scene? Any why are you rendering with hardware rendering, generally i'd only use that for particles.
If you upload your scene file I'm sure someone will be good enough to let you know what has gone wrong.
Welcome to SimplyMaya
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?"