Code not responding to Limit Switch Signal

[Migriemsl]

We are having problems with our limit switches. We are trying to use our switches to prevent our manipulator from going past a certain point, but when the switch is hit the manipulator doesn't stop. The manipulator is working and the switch is sending a signal though. We think our code could be the problem, but the switcch itself is working just it isn't triggering the operation we want.