E-125 Upload problem

okay, i've overclocked my e-125 to 180 mhz i've heard about problems syncing large files but i never had a problem until today. When i tried to upload a 17 meg file it stopped out at 15 meg, i tried another file that was 17 and again it stoopped out at 17 meg, has anyone else had this problem and is there a way to fix it??