I'd tell you to read what was the RT sticky, but I'll just copy it here instead since you have it installed and everything.
Gas up, without paint. Head outside with your RT-equipped gun and the small flathead screw driver, and do the following.
Turn the adjustment screw (This is the one on the grip side- The small one inside the air fitting, not the nut/fitting itself) all the way in until snug. Don't crank it down too hard. Fire a few shots. After 3-5 it should become near impossible to pull the trigger. This shows that your RT is properly installed and working. If you can still pull the trigger freely after a dozen or so shots, skip the next paragraph.
Now adjust the screw out-wards a turn or two. Pull the trigger lightly until the gun just fires, and try to hold that point. You should feel the RT kick against the trigger and reset it. Continue to adjust and shoot until you find the setting you like. Turning it out-wards makes the RT effect lighter and faster, up to the point where it doesn't work anymore.
If you can still pull freely after a dozen or so shots, degas your marker and head inside. Check your parts and check your install work against the instructions, because something is not right. Pull the piston out of its housing and see if it has grease on it. If not, give it some lube (not oil) like some Dow33. Make sure you have the air line on right as well. Once everything checks out, start the test again."