autonomous help! - line tracking

hi everybody!
we are getting really hard time on line tracking…we are using 4 mecanum wheels that are controlled with 4 motors. we are trying to change the default code to wrok with no success.
can sombody please help? or even post some code? thank you very much

What language?

How many sensors are you using?

LabView
3 photosensors

If you opened your drive motors using “4 motor drive”, and mounted your photosensors as instructed, the default code should work as is, with perhaps some tweaking of the motor speed array.