Media Player Playback Error

I’m streaming video content (primarily .avi files) from my iMac to ATV2 via Media Player 0.9.1. 90% of the time I have absolutely no trouble doing so. However, in cases where I have paused the downloading of a video then resumed and allowed it to complete, Media Player will not play the video (once downloading is complete) and displays an error message that it is unable to access content. The confusing part is that the same file will always play on my iMac, but Media Player can’t handle it. If I re-download the same file and do not interrupt the process Media Player will stream it just fine. I’m stumped.