I have reviewed the code and the error is not in the paths.
The error is in the names of the tables "wp_bannerize_b" and "wp_ [x] _bannerize_b"(apparently solved in release 2.2.1)
The code works fine, but when I create a site with WordPress 3, it did not create the table "wp_[x]_bannerize_b" and must be done by hand.
If I create by hand the table, the plugin works correctly.
Any suggestions on this issue?
More information about the problem here: