I keep going into the castl and talking to the argonian. But she says she will go get him then goes about her business walking around the room. I have the vampirism cure and the Mages guild mission where the count asks you to get rid of the vampires and the vampire hunters. I searched the castle and I can't find him either. I also used a command humanoid spell on the argonian. What should I do?

Hmmm, been a long time since I did this, http://www.uesp.net/wiki/Oblivion:Vampire_Cure#Bugs for this quest, may provide some useful info.