Just share my experience , I quessed someone in this forum have this experience after download few parts or full parts (say 12 parts ) then when try to play only can play part 1 and the other cannot join because those files don't have file type/extension 001, if you have this experience then try to split again that part 1 (split to 1) to make it have extension 001 then after that rename other parts same with this part 001 (after slit) then try to join , You can used FFSJ software for this purpose, for detail instruction you can download this rapidshare file .