Dreampup leak

I have an original dream pup .22. I pulled it to go shoot and noticed it was reading 0 bar. I know it was about 150 bar when i put it away a couple months ago. I remembered reading about the valve seat issue. So I took the air cylinder off and sure enough the parts fell out. I checked them as best i could and don’t see and damage. I watched 910’s video on reinstalling the parts and used a tiny bit of lock tight. After reinstalling i could hear air coming out the barrel. I disassembled and redid the process to insure it didn’t mess it up. Second attempt same issue. So anyone can point me in the right direction??