QUOTE(Remux Dreadfire @ Apr 7 2006, 04:17 AM)
Damn it i did all the quests the vampire in dark brotherhood asked if i wanted to become a vampire said yes did the things he asked and nothing happened!

Vicente tells you to sleep in a secure location.
Like the Brotherhood sanctuary, for example. Sleeping there works. Make sure you're
sleeping though, and not
waiting. Otherwise he won't come. Then you have to wait three days for the infection to take hold and then sleep. You will then become a vampire.
During the three days, do
not use a chapel altar, or cure disease potions. You will rid yourself of vampirism.