Put the character's Saving Throw number in the field called "Target" (if I'm remembering the label right, without double-checking). For example put a 13 under Target. Then it should say Success if the roll is 13 or higher. You don't need anything in the Modifier field, but if you need a modifier, it would usually be +1 or +2. You don't need a 0 or +0, just blank will do the same. If this is still not working, write back.
