Read up on how to install evox manually by downloading the disk (Guide on Xbox-scene) or download an autoinstaller disk such as slayers if you are that much of a nooby (which it would seem). If you screw up too much, then youll need to buy a chip.

Softmods arent foolproof people, read up on the pros and cons of it before you do it. Dont abuse an autoinstaller, especially since when crap like this happens, you are too lazy to look up the fix, and you dont know how to do it yourself.