are you getting blank pictures, indicating the flash isn't working? You might have to check the negatives because the photo finisher may not develop those so you wouldn't know by looking at your developed pics.

If you don't have any, then think of it as a good thing. 95% of all my pics are night pics, doesn't paint a rosey hunting outlook does it? For some reason every year I have an extremely high rate of night pics. I've gone entire years without a daytime pic of a buck.