Motor shield and Irremote library

Hi everybody. I am makink a IR controlled robot. When I put the irrecv.enableIRIn() comand, only two of the four motors on. When a comment that command, the four motors run ok.

Other post/duplicate DELETED
Please do NOT cross post / duplicate / hijack as it wastes peoples time and efforts to have more than one post for a single topic.

Could you take a few moments to Learn How To Use The Forum.
It will help you get the best out of the forum in the future.
Other general help and troubleshooting advice can be found here.