You seem to have followed the instructions at Portforward.com, it looks okay.
Probably these won't help, but just to cover all the simpliest of angles:
- You do have Virtual Server enabled?
- You did press "Finish" so that the router rebooted?
- You have 192.168.1.1 as gateway in you computer's IP settings? (although your net probably wouldn't work if you didn't)
Also, could be your software firewall, you should have added 192.168.1.1 (and to be safe, 192.168.1.100) to be "trusted" or whatever it's called in your software. Fumble around with the firewall's settings.
Do you mean that uTorrent's Speed Guide Port Checker reports that the port is not open?