[Edited by Elaksation, 12/5/2011 11:58:40 AM]
Thanks for persevering with this.
The steam trainer will activate, but whenever I press a number to turn on a cheat there is no audible "activated" and the cheat is not turned on. Would you like a copy of my .exe?
I had the same problem. Check Windows Firewall. I had to grant permission for the trainer to go through.