I have been working on making a chest freezer work for serving beer with what I have. Eventually I'll put a nice tower on top and some good CO2 fittings and everything, but here is what I have right now. And when I went to try all of the kegs one of them won't pour. Just a small amount of foam will drip out. I tried changing the beer line and that made no difference, and I tried pushing it up to 30 psi, and still got nothing. Anyone have an idea what is going on?