Bridge-ACR Help Please

I'm using Bridge CS3 v2.1.9

I have CS3 v2.1.9 and using Bridge I have been opening JPGs in AdobeCameraRaw with no difficulty using the keyboard shortcut CTRL-R. Now all of a sudden it won't work. In addition 'FILE > Open in camera Raw' is greyed out.
Any ideas?

Thanks for any help,
Henry

Have you done any updates to Bridge, or made any changes since it last worked? There must be some change if the behavior has changed.