Usually, non working triggers are due to some small bit of wood rubbing or blocking the movement of the triggers.
Leaving the triggers installed, remove the lock and look down the hole where the arm of the sear would be if the lock was still installed.
Looking into this hole, pull the front trigger.
You should see the blade on the top of the front trigger move up and block off at least 1/2 of the hole.
If the trigger blade only comes up to the bottom of that hole, your job is to find out why.
The easiest way to do this is to apply some cheap lipstick in a thin coating on both the front trigger and the rear triggers blades. Then reinstall the triggers and pull the front one until it stops. While your at it, set the rear trigger and then release it by pulling the front trigger.
Remove the triggers from the wood and look for signs of lipstick that has rubbed off of the trigger blades. If you see any at all, the wood it is on must be removed.
It doesn't take a lot of wood removal to fix these things so don't get carried away.
Another problem area can be the sear arm that is sticking out of the lock towards the barrel.
Sometimes, the hole that is drilled into the wood to clear this arm is not drilled deep enough.
When this happens, the locks sear arm will bottom out in the hole making movement almost impossible.
If the arm is hitting the bottom of the hole you can either drill the hole slightly deeper or you can file off a little bit from the end of the sear arm.
