Cannot connect/host using Netplay in project M

Every time I try to host/connect using netplay while playing project M I can not connect to anyone. I get the message disconnected after it hanging for a while, I am using 4.0-652. I know the iso file is perfectly fine so it's not that. I have tried turning on DMZ on my router and that hasnt helped, I tried forwarding a port and having the dolphin emulator use that port and that didnt work either. I'm at a loss of what to do right now, my router is a belkin N150, f9k1001v1, with the latest firmware updates. Can someone give me advice on where to go from here? I've attached a screenshot of the disconnect message.

  4-19-2014 3-12-36 PM.png (Size: 65.16 KB / Downloads: 7)