Welcome to the forum.
The first thing you need to do is figure out your liquid temp. Put a glass of water in the kegerator overnight and measure your temp in the kegerator as well as the first beer you pour.
http://www.micromatic.com/beer-quest...er-aid-46.html
Chances are, your first beer poured will be warmer than the glass in the kegerator, because your tower is not cooled. Search this forum for info on installing a fan to cool the tower.