As K6III mentioned a few days ago, the SS CW Cabrillo Robot is very strict about how you spell MLDXCC, and somewhat subtle about notifying you if you mess it up.

The only accepted CLUB line in the Cabrillo file:

CLUB: Mother Lode DX/Contest Club

Check your confirmation email from the Cabrillo robot carefully. If you don't see "Club:" listed after "Location:", scroll down FIVE LINES AFTER THE SIGNATURE, to the section labeled

*** Informative Messages from the Contest Robot ***

And you'll see the problem. I almost missed it.

73,

Bob, N6TV