The clip is not damaged since if one of the legs were damaged/broken you'd get an error (1, 5, 6), since all the legs have to make a connection with the Nor Chip... also are you trying to get a dump from either a Fat or Slim? If it's a slim you should consider using a clamp.
Also, you'd know if the clip is damaged by looking very carefully at the legs... are they straight. Also consider using rubbing alcohol to clean the clip constantly. You don't need to file it down, that could possibly cause more damage.