The thing is, if the Terms and Conditions said I was not eligible, I'd say "fair enough". Nice though the First lounge is, you can't get a decent shower there and need the hotel room (5 minutes' water on the A380 is simply not enough!).
Added to which is the apparent inconsistency of a poster above being allowed to book Dubai Connect in seemingly identical circunstances.
I intend trying again and will keep you posted.