did a 5 gal rootbeer extract kit by simply adding sugar, water, and extract. put it in keg 5 days ago at 50psi and still taste flat. only dropped psi to 30 to serve. i know this is prob high but i was just checkin carb level. i have no leaks and its the only keg running in the keezer right now. does anyone have any clue what i could be doin wrong? i need to fix asap kids are on me every hour about it... by thee way i have never had a prob with beer carbing up in this setup.