WNRD38800 - can't forward port 1723

[unevenload]

I installed a WNDR3800 this weekend. I run a SBS server so I need to forward certain ports. One of them is port 1723 for PPTP (VPN). When I try to forward the port I receive the message " the specified port is being used by other configurations. Please check your configurations of USB readyshare, remote management, port forwarding, port triggering, UPnP port mapping table, RIP and internet connection type." I don't need those features and turned off what I could. I do not see which service is using port 1723. Any idea what is using it and how to disable that service so I can VPN into my server?

[jmizoguchi]

try hard reset the router and see. some time it will fixes the issues.