As I recall, wasn't it based on a book? Unless the original writer made a sequel to his story, I'm not sure this is going to be even decent.
There was a certain charm to the first movie, and it looks like the sequel is merely attempting to revisit the same jokes (though that could be an effect of the trailer more than anything.)
I try not to judge too harshly before I've even seen a movie, but I don't have very high hopes for this.