They won't come unless the enviroment is suitable for them. They require shade, water, plentiful food source, etc....all the usual things. IF those factors are available THEN they may take advantage of a nice bat house. But the bat house won't attract them if the other things aren't there.

Some bat species prefer a more sheltered house, while others want something out in the open and will take up residence in a bathouse on a pole.

Be patient and do some more homework. It'll be rewarding when you succeed.

Here is a link that might be useful: Florida bat house successes

I operate a bat exclusion company in central Florida. I get many requests from people that sound like this: "can you please trap some bats for me and put them in my bat house?"

It doesn't work that way! The bats have to find the bat house on their own, and they are more likely to do so if you follow the BCI guidelines posted above.

Also, this post proves that people want bats. If you do have bats in your house, it might be a blessing! Don't be so quick to try to get rid of them. If you do want to exclude them, make sure it's done right, and that none are harmed.

Here is a link that might be useful: Bat Removal & Control in Florida