So I spent money to buy the expansion of Dead Money....

Started playing, meh so far. But after I start at the fountain and get all 3 other people there go though the motions. Then put 2 of the 3 people in the correct spots. I get back to the fountain and that SUPER MUTANT DOG is no where to be found. In fact its guiding me to the bottom right of the map to a place I cant get to. And I cant start the GALA without him. WTF? This is the WORST EXPANSION EVER! thanks now I cant open the gate, and can not continue. gee this is such an awesome game.

Please fix this!!