Remote Desktop

I set SOHO in our building : Lyncsis router, a printer and four PCs. I established the Remote Desktop connection with one of computers located in the other end of our building. Everything was fine. But when I tried to connect the Remote Desktop to my computer in my office from that remote one, I failed to do that.

I checked all settings on both PCs Firewalls, settings in the router’s Firewall, checked both accounts have permissions to operate the Remote Desktop, but no matter what I tried I still cannot get the Remote Desktop connection from that computer. It works only in one direction. I use dynamic IP addressing in the router and double checked the addresses on both PCs.

Anyone can explain what’s going on?