You probably need to open the preferences in the DNG converter and change the compatibility to Camera Raw 4.6 and later.
Hi Jim I have tried that but it still wont play ball
Pulling ones hair out thanks for the reply
You say you can't view your photos, did you get the message 'conversion successful' when you converted them? If so then I don't know what to tell you. If not, maybe it's a compatibility problem.
If that's the case, make sure your OS is compatible with the DNG version you download.
Scroll down on the DNG download page and it will tell you if your OS is compatible with that DNG version.
I had a similar problem. My OS was not compatible with the DNG version I downloaded. I upgraded my OS and am able to use version 9 now.
If this is your problem and you can't or don't want to upgrade your OS, you will have to download an earlier DNG version.