Same happened for me! I was hacking angmar campaign #5, and all my units started walking on the spot. The hole game was frozen! I dont know why.
i had the same problem with a trainer...cant remember what trainer...had 2 start the mission where u find the palantir shards again a few times before i got all the shards without my guys walking but not moving.
[Edited by hell1000, 7/29/2009 12:06:35 AM]