[hec]

Have you tried connecting to your PC via Wi-Fi? I.e., establish a Wi-Fi connection from your phone to the router and then use the PC's internal IP address for the remote session. This would help determine if your router is in fact the problem in trying to establish the connection. If it still can't connect, I'd suggest you check the settings on the PC (e.g., firewall, remote desktop). If it can connect directly, then you know the router's settings are the issue.