So I kegged my first beer, and Irish Stout on Wed. The fridge is set at 40 degrees, and I set the co2 at 10psi. I thought it would take about a week to be carbonated, but so far there is nothing. It is completly flat. Am I jumping the gun on this? Another thing is that I cant tell If my tank is empty or not. The gauge is showing 10psi, but when I turn the gas down, or even off, my gauge does not move. Any suggestions?