I got the same message from the FD Helldesk regarding CO codeshares - they are definitely not available.

I have had an upgrade request in the system since July 2003 to upgrade my party travelling this weekend BHX - EWR - MIA. KL lost my request at least four times and CO rejected the request three times. It was eventually rejected because it was submitted too early. I have resubmitted the request repeatedly with the same response.

ITN.NET shows availability in all classes for my flights yet CO will not release the upgrades.

So much for the alliance.