I have a brand-new down on 60 camera which generates CO2 files. Unfortunately I have not been able to edit any of my photos using Adobe camera raw or bridge or Photoshop without converting to DND files. Do you and you files are larger than the CR to file sizes and therefore I don't like them. Is there anyway for me to work directly on my Cr2 files like I did on my NEF files when I had the nikon? Yes my Photoshop is up-to-date.
What version of Photoshop are you using, and what version of Camera Raw plug-in (ACR) are you using?
If your camera is a 6D then you need Photoshop CS6 and ACR 7.3 or newer to open the CR2 files.
If your camera is a 60D then you need Photoshop CS5 and ACR 6.2 or newer to open the CR2 files.