Moving this discussion to the Adobe Camera RAW forum.
If you have a camera that is newer than what was supported in that version then you will either have to upgrade to the current version of Photoshop or else you can use the free DNG converter to create digital negative copies of your raw images. Those will open with what you have now. There will not be any more updates for Camera Raw for Photoshop CS3. That version is out of production and is no longer being supported or updated by Adobe.