No capture frames detected usually means that 1) That you've reached the end of the tape, or 2) Premiere has encountered a break in the timecode - usually caused when the cameraman reviews a scene but doesn't cue up the incoming material to the previous scene. Batch capturing - omitting this break - usually gets around the problem.
As far as unsupported file type - 'fraid I don't know. If you're capturing through Premiere - using the native codecs - it should work.
What are your settings?,
