Q: I could stream yesterday from my iPhone and iPod to my Apple Tv but today i cannot plus when i go into Computers on Apple TV it tells me cannot be found any computers

Restart the Apple TV

Sounds like the AppleTV is having connectivity issues.

Not having one myself, I really cannot offer any solutions.  You might try the AppleTV forums.

To do any troubleshooting in an IT environment you have to isolate the problem first. As noted in the other comment in your case the first step would be to ensure your Apple TV connects to your network. To do so, please firstly go to the Settings page of the Apple TV from the home screen and check it. Then ensure the TV is visible on the netwrok by running a free App called 'Fing' on any iPod/iPhone/iPad connected to the same network.

Please post the info, so that we could assist with the further troubleshooting.