Media Player

I have been using ATV for several years and I keep having issues with the media player. What I am currently getting is an error when I try and play a movie off my computer. I can connect enough to see the computer as an FTP, however when I try and connect or test connection it times out and says invalid FTP or user/password is wrong. I have no password set and the file share is set. I have since rebooted both devices multiple times, added and removed the media player on the ATV and still no luck.