You haven't done anything wrong - this seems to be a glitch in the game for some people with GeForce cards. The best I can tell you to do is go into the hotel and see if either the phone is ringing or you can get through that locked door on the second floor - it leads to the outside. If either of those things happen you're one of the lucky ones that the game solves that miserable arcade roof walking sequence for.
Also know that the phone ringing could be triggered by something else also (after I crossed the roof it never rang for me - something else caused it to start ringing and I have no idea what). As far as I could tell the only thing that roof escapade did for me was let me get into the hotel via the locked door.
Dark Side : Risen
I can only please one person a day. Today isn't your day. Tomorrow's not looking good either.