Try pushing her to the door. If that doesn't work, reload a previous save. That's all you can do :(

Is she a child? I recall the vault (fallout wiki) saying something about child at heart... Or is it a glitch?

Its a glitch i got the same crap and had to start all over

Save the game before pressing the button and if sally runs away exit the game and try loading it again it worked for me

Having the same problem, every time i load the save she does the same thing, blinks in and out of the room on the teleporter, when i follow her she runs to the 'inaccessible door' and just stands there with soma saying 'lets go this way'

Yeah, its a glitch i had the same thing except my problem was that she never teleported to the room and i was over encombured that particular has alot of problems there is no fixing it just load your last save point and try again.