Hello! are you on a PC, a MAC? can we have more info about your machine.
Is anything non-standard on your setup, for instance: Are you using restricted profiles on a PC?
The window does not show, there is no error message? is Ps running? does it work from Photoshop? what kind of files are selected?
If you give all the relevant info directly you'll get your answers faster.
I am using a PC with Vista 64. Yes Ps was running. Let me say that an update for both Cs6 and Bridge recently posted by Adobe, since my message and after I had tried several times after I got the new Cs6, now all works well with the Batch screen coming forth as it did in Cs5.