Bad Behavior returns 403 Error

Hello. I have had WordPress up and running on my two sites for over a month now and have had no problems logging in and out until now. About a week ago I installed Bad Behavior to prevent spammers and the other day when I put in my username & pw at wp-login.php I received a 403 Error from ioerror. Now, I’ve been successful logging in using Internet Explorer but my browser of choice is Firefox. Is there any way to fix this without having to disable my privacy settings in Mozilla? I’d rather not resort to using ie just for wp. Thanks!