Not able to watch full lenght AVi formated movies. Its stops in the middle

Hi, Ihave xvid codec movies only, inception 1.38gb cuts out 1hr 47min ,the boondock saints 2 1.1gb cut out 1hr 45min, eatpraylove 1.36gb cuts out 1hr 47min  says incorrect format error message all are 29 frames/sec. I also have twilight 701mb 2hr 01min plays all the way through 23 frames/sec , Twilight-new moon 1.04gb 2hr 10min plays all the way through 29 frames/sec, twilight-eclipse 1.02gb 2hr 03min plays all the way through 29 frames/sec.I also have australia 1.17gb, the last samurai 1.26gb, lord of the rings-the two towers 1.46gb this 3 are 25 frames/sec and play perfect without cutting out.

Unfortunately I cant seem to find any decisive trend to pin point the problem whether being size ,codec or frame rate can anyone please offer suggestions all the above movies play perfect on pc the problems are with play back on wd tv mini have already try reformatting harddrives turning on/off and reset suggestions from other discussions to no avale.