Your action replay and it deleted all the cheats and now you cant put any cheats it just frezes up why does it do that

Possible problems:
There could be many reasons but the most common are that you used too many cheats at the same time or the Action Replay was faulty or busted. Possible ways to fix: well there is only one i know of and that is to COMPLETELY reset the AR
With the console off hold in A+B. Turn on console while holding these buttons. As soon as the Nintendo screen appears, before the message saying this product is not endorsed by Nintendo, press and hold start and select still holding down A+B. Hold until main AR screen is displayed then release.The AR is reset.

There is also a chance you may have to buy an entirely new one so... sorry