Hi,
I think you should try to first cream the cheese without the sugar. In my experience, the more you mix the cheese after adding the sugar, the thinner the batter becomes. (I prefer a thicker one myself.) Also, you didn't say what speeds you used when mixing. When beating the cheese you can get away with medium to high, but once you start adding other things you should stay on low or speed one.
P.S. Do you ever get lumps of flour in your batter? I only ask because it seems that you add it near the end.
Good luck. Hope it works out for you. If not I have a great recipe I'd be happy to lend you.
Schiznick:cool: