Dolphin Netplay 4.0-652 crashing upon anything!

Downloaded Dolphin Netplay 4.0-652 and every time I try to load a game or configure my GCPad, it just hangs and will not load. Eventually it crashes. I am using Dolphin 3.5 and it works perfectly, but I need 4.0 to play online @_@

Specs:

i5-3570k
Nvidia 660TI
8GB Ram

Any idea?