4 Motor Tank Drive Problem

[nickcvet89]

So yesterday we encountered a problem with our tank drive program. Last year we used only 2 motors for driving last year, this year we are using 4 motors instead. In the default code i replaced the arcade drive with tank drive and added the close vi in finish. Everything worked fine on our past year robot with 2 motors but when i replaced the open 2 motor vi with an open 4 motor vi we had some issues. The robot drives with the open 4 motor but only 2 of the motors work, one from each side. We have a victor for each motor but only 2 of the victors are receiving signal. The robot is driving but only 2 of the motors are active we would like to get all of the motors working. If anyone has any ideas on how to fix this issue please post. Thanks