The other thing that isn't showing is the caster level in the Specials list. The script shows field[Value].value to be added to the field[livename].text but I'm guessing that it is different for the Fang Dragon.
You would have to set the Value field in the bootstrap. Typically, the Value is the level of the spell, so it shouldn't matter that it's for a Fang Dragon. That said, there is usually a default so I'm not sure why it wouldn't be showing up without being able to see it.