Samsung SPH-i700

I recently tried running a video on my samsung sph i700. I loaded the video into my 256meg card in the sd slot and ran the windows media player that came stock with this unit. The problem i ran up against is that the video ran choppie. It looks like every second frame is missing. I took my 256m sd card out and put it into an ipac 1935 (206mhz) and it ran well. so i know it wasn't the card that was at fault for the choppie video. I also selected turbo on my samsung sph i700. but it still didn't run as smooth as his $200 unit. So my question is.......has anybody run a video on this unit? And was it something that i did wrong?