Thanks for the reply. I had tried it this way too and it didn't work BUT I just discovered something. After the scan of this particular card one of the fields was not automatically filled in (Company Name) I had been manually typing that in before saving it. Just now I tried scanning again but this time didn't add anything manually and NOW when I saved it the card appeared in Evernote.
Just to verify, I went back and did a new scan, manually adding the data as I did before, and wouldn't you know it the card failed to appear. So right now, for me at least, I can scan but not manually add anything else above what Evernote auto fills in.