new vegas problem

Ok i decided to rule new vegas and i was fighting at the hoover dam and some how i fast traveled out of it, and now i cant get back in and it won't let me fast travel at all.

There is a invisible wall around the hoover dam and i want to get back in, any ideas?

shit dude... you got fuckedddd

revert to a autosave that is close to the time you were playing?
if not look up the Restricting Invisible Walls Remover
its badass

Ah fuck. I think i saved before i started taking over. I'll go back to that.