Cannot connect to my PC from iPad. Error says "cannot connect to server".

Cannot connect to my PC from iPad. Error says "cannot connect to server".

I cannot connect to my home computer unless I am connected to wifi on my home network. My iPad has the latest iOS. My PC is running Windows 7 Ultimate and has the latest Wyse PocketCloud Companion loaded and running. I verified that "Remote Desktop" is enabled on the PC. I even went as far as to create a gmail account to see if that would help. The credentials have been entered into companion and the account is now synching with my iPad. When I run the diagnostics program on my PC, everything checks out fine. I have tried entering in the local IP address of the PC and the public IP with no success. I also have ensured that port-forwarding is set up on my 2wire gateway. As far as that is concerned, I even went as far as to set the PC in DMZplus Mode to allow all applications through the gateway firewall. Any suggestions????