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Yeah, I got this message a lot when I was using the CS6 Beta, where you had to pass through the Photoshop "demo" screen each time you launched.
Bridge launched "free" and would navigate OK. But when you launched ACR from Bridge you got this message if the Photoshop beta was not already running and was past the demo activation screen.
So basically, it means your Photoshop is not recognized as registered. If you think it is registered, then you've got a bigger problem and will probably have to use Adobe live support to sort it out.
But also, check your Bridge/Preferences/Startup Scripts and make sure the Bridge and Photoshop options that "enable communication" are checked.