Linksys and Remote Desktop

I’ve been trying to connect from my home computer to my office computer using Windows XP remote desktop connection with no luck. My computer at work is behind a linksys router. I have upgraded the firmware to 1.45.7, open the ports 3389~3389 tcp and 4908~udp and still can’t connect. Also i just tried using 3389 for tcp and udp with no luck. Does anyone has any suggestions? thank you!