You may be trying to get enslaved by someone who can't enslave you. Not everyone can. A quest giver will sometimes be marked as "essential", so if they can't be killed, they can't enslave you. Delphine and Ancano and people like that can't enslave you, and there are other exceptions. The Redgaurds at Scoundrel's Folley, during Saadia's (in Whiterun) quest, for example, can't either. Don't know what's up dancing not working or your God-mode issues though...
Actually, what I meant was it was delayed, it takes forever to get enslaved. Is it one of my other mods, or my computer can't run scripts fast?