Replying to FCP Express capture problems HELP!

When I capture footage from my HV30 into final cut express it starts capturing perfect then after about 2 mins it stops and saves it like its at the end.  Then thats it it wont capture anymore even if I have an hour of footage on the tape.  So I captured into IMovie and then tried to import it into FCP Express but just get a file error message and it says it cant import it to FCP.  What the fuck! I'm about to smash my fucking computer.  Anyone have any similar problems and/or a possible solution?