no beer tapping

[hoke3182]

I've had my kegeraor for about 4 months, and it's worked fine up until recently. When I try to tap a beer no beer comes out. The air tank has air in it but I still get no beer. I've been drinking miller lite and the first few kegs were the black rubber ones and they worked great, but recentley I've been getting the aluminum kegs and thats when the problems started. I've insulated my beer line thinking he may have froze up but that was'nt the problem. Can someone please help me?

[wineglow]

The check ball may be stuck --- take the keg coupler off the keg, turn off the co2 - shake the keg coupler and if you don't hear the check ball moving freely take a small object and while pointing the coupler away shove it up the hole in the keg coupler - re tap .