I need all you nitrous guys...

NOT BRAKE FLUID... aerosol BRAKE CLEANER!!!

sorry. I hate to yell, but that would be bad...

No tape or sealer should be used on any of the fittings. Especially the NO2 side. The fact that the ports are front and rear mean little. I've seen one system that was never used..Which was good, because they mounted it with the holes pointed up...Must have been ina rush. You may want to pull the nos line from the solenoid, hold it with vice grips (wrap a rag around it first to keep from squishing it) and then pointing away from people and stuff, have a friend crack open the bottle. (hold very tight...) There could be a problem in the bottle's valve too. Have you tried borrowing a bottle from someone?