Samsung Omnia i910

ok here we go. first of all I am not good with computers and phones. I have dealt with customer service for the omnia and they can't even help. I am trying to download a game from freewarepocketpc.net. I first download the game to a file on my desktop. next i plug in the phone to the active sync and open up the storage card and put the game in there. next i go to the storage card on the phone and try to install. the phone shows attempt to install unsuccessfull. i download google maps which worked and that is it. no games or other applications will work.. Can someone PLEASE HELP ME? Thanks in advance.