So I just kegged my apa in a sanke keg and the temperature was at about 53 degrees which lead me to force carbonate at about 17 18 psi. After vigorously shaking the keg for ten min I unhooked my co2 and stuck it back in the fridge and its been in there for about a day and a half and I go to check it by pouring myself a beer and it seems as if the co2 try's to escape and is not flat but taste like a beer on nitro anybody have any advice on why this keg is not carbonating?