SCK Trap Question

[willwhitt56]

Hey guys, im trying to make a trap in a specific area where, when the person steps on it, spears act like a gate, trapping the player until he/she can find a lever to open up the path. what i want to ask is, how do i make it so that the spears stay where they are when the trap activates

[willwhitt56]

the dang pressure plates arent working, so does someone know how to make a trigger box?