I have also been working on a vampire mod. But mine is a complete overhaul (and I do mean "overhaul"). I've had boatloads of trouble manipulating the existing mechanics and I've solved a lot of it (with plenty of help from other folks here on this board!)
Give as much information as possible - you might be running into some of the troubles I've had...
Did you change existing scripts?
Did you change the existing perk? Actually... better question is: What all did you actually change?
Well for me I did the following:
I removed the vanilia script in PlayerVampireQuest with my own. Which was really just a cut & paste with my edits put in.
I went to every MagicEffect and Perk that had a script that called out for "PlayerVamireQuestScript Property PlayerVampirequest" and I changed it to "DVampireScript Property PlayerVampireQuest." DVampireScript is my new script I added to the quest for vampirism.
Everything WAS working but not when I load my vampire save Feed isn't working. Everything was fine until I compiled all thes scripts I changed to make sure they were saving and they did. No errors were returned on any.
Yet everyone who plays my mod has the vanilla script loading instead mine and now Feed is broken in game.
*PULLS HAIR OUT*
P.S. Mine is intended to be an overhaul as well but I've been hung up on this problem for literally a week now. I can't figure wtf is going on.