Your computer might be too slow to play the file. Eclipse usually has Xvid versions, you can try that. My laptop has a Turion X2 1.8GHz 64-bit and it even has some trouble playing back the same FMA files with 1 thread. Since it's dual-core I can set it to 2 threads and it won't have any hiccups.
Your particular processor is only single-core but you can try the Pentium 4 build.