This is driving me a bit mad. I had a similar problem with the RetroAchievements integration but eventually got that working after a whole lot of googling and trial and error, but now it's happening with Emumovies and I just can't get it to work.
I did try logging into Emumovies directly and can confirm I'm using the same password.
Whether I try to force update the media or put in the password through the options -> integration menu, whenever it tries to log in it uses the wrong password. I know LB is using the wrong password because it's a different number of characters, but when I try to save the correct version, it just defaults back to the wrong one! I've tried clearing my username and password from the integration menu, saving, exiting the program, going back in, finding the fields empty, entering the CORRECT username and password, save it, close it, restart it...and sure enough, it's the wrong dang password again!
FYI I'll be back in a week or so. Any help would be very much appreciated as I just added a bunch of games to me collection and I'm missing out on a lot of stuff.