SUPER DUDE

i have imported xViD file into WMM and they have loaded fine and scenes have been detected as normal. i edited the clips to compilation and i saved it. when i click "save to computer" uder finish movie it goes through the motions until the actual creation where it says "cannot complete the save movie wizard" and gives a list of variouse possible reasons. (e.g. not enough disk space, invalid location ect). i have corrected all the pssible problem and now the only thing i can think of is that its something to do with DivX.

please help me
p.s. the project is over a hour long built up of 300 clips and each clip is in HD so the project is fairly large