First of all, you should have used the Adobe DNG Converter 8.6, not an old, obsolete version. Always use the very latest version. 8.3 was simply the first ACR version to support your camera model, that's all.
Note that the DNG Converter works only on folders, not on individual raw files. Put all your Sony raw files in a folder and run the Converter on that folder containing the raw files.
I have absolutely no clue as to what on Earth you mean by : "upon reading the memory chip from Photoshop CS5".
You also need to make sure that CS5 is fully updated. You cannot rely on the highly and notoriously unreliable Adobe auto updater to tell whether you have the latest update installed or not.
I still have no idea what platform you are on, Mac or Windows. Please read the following for next time:
BOILERPLATE TEXT:
If you give complete and detailed information about your setup and the issue at hand,
such as your platform (Mac or Win),
exact versions of your OS, of Photoshop (not just "CS6", but something like CS6v.13.0.6) and of Bridge,
machine specs, such as total installed RAM, scratch file HDs, total available HD space, video card specs, including total VRAM installed,
what troubleshooting steps you have taken so far,
what error message(s) you receive,
if having issues opening raw files also the exact camera make and model that generated them, etc.,
someone may be able to help you (not necessarily this poster).
A screen shot could be very helpful too.
Please read this FAQ for advice on how to ask your questions correctly for quicker and better answers:
http://forums.adobe.com/thread/419981?tstart=0
Thanks!