Why my rc rock crawler goes off or not function when it moves forward.

My rc rock crawler do not move forwards but it goes back

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

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crwdns2889612:0crwdne2889612:0 0

crwdns2942205:01crwdne2942205:0:

What are you trying to say? Are you saying it doesn't move forward when you tell it to or it moves forward when you don't tell it to?

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