Delay in controls (HELP!)

Our robot has been fine up until today. Nothing different has happened. When we turned it on today, it seemed like the motors wouldn't run. But then the robot moved. It seems we are experiencing some major delay between our driver station, and our robot. We tried it inside our room, with the robot on blocks right before that, and it worked perfectly. we then took it outside, and....lag! Any answers would be great!