Unable to get PlayIt to work with Source engine, and Goldsrc Games

Whenever i try to connect PlayIt to host Source engine or Goldsrc games, Before it worked smoothly, now it doesn’t work. I set the IP given by PlayIt using the IP command in console and suddenly, TF2 loses connection to the item servers, and Sven Coop refuses to connect or even use the assigned IP. Please, someone help me.