I'm about to start kegging for the first time, and I set up the CO2, regulator and keg. I have 5G of sanitizer in the keg right now and have everything connected, with the pressure to the keg about 10psi. I know there's CO2 going into the keg because I get CO2 out when I pull the release on the keg. However, I'm not getting any liquid when I depress the handle on the picnic tap. Help!