Did you set the compatibility options properly in the DNG converter? You would need to have the preferences set to Camera Raw 2.4 and later in order to generate DNG files that would be compatible with your version of Camera Raw.
Selecting Camera Raw 2.4 solved the problem. Thanx much, Jim
What's the file size before and after conversion?
Beware that with some compatibility settings you may end up with a
Sent from phone.
Correct, and in this case the resulting DNG will be demosaiced, but that's the only way to read this into CS2.