I have a ceiling fan with a remote that was working fine, then the fan would not work with the remote, but would work with the chains. Now the light will not work with the remote and they will not work with the chain. What's the problem?

Rewire the fan without the remote receiver (inside the canopy) and see if it works.

Ceiling fan wiring - Ceiling Fans N More (http://www.ceiling-fans-n-more.com/ceiling-fan-wiring.php)