You have been directed to this page because you reported a game problem that no one else has reported. In general this means that the problem is local to your install: if it were a problem with the mod's logic then other mod users would have the same problem. Even without any mods installed, BG2 sometimes "degenerates" and strange things happen. This happens rarely but often enough to encourage me to write the steps down once and for all (say, about 40 times total).
Fortunately, there is a method that solves all such problems 99% of the time.
Unfortunately, it takes a few minutes.
Here is the method:
This technique fixes almost all "random" or "local install" problems (i.e., problems reported by only one person when many others have used the mod and not encountered that problem) associated with Infinity Engine games (with or without mods). Sometimes your game data files (BIFF files) or your override folder can become corrupted. This can happen because of a random hard drive problem or because of a problem while installing a mod. Starting fresh with a clean BG2 install almost invariably fixes such problems.
Good luck!