Help! Mbot proceeds in reverse!

#1

Hello. My Mbot when I program it to go forward instead proceeds back! When I program it to go back, it goes on. I tried everything, but nothing. What may have happened. Can you help me?

#2

Ok. I solved the problem. I had inserted the M1 and M2 cables upside down. M1 must go to the left engine, M2 to the right engine. Thank you!

#3