LDAP Address Book Display

[dirtboy]

I have successfully setup Roundmail to use a global LDAP address book, but I have a problem.  When I search for anything and get results, I have blank lines in the results pane.  Clicking on the individual lines will give me the full information for the contact in the right pane.  

What ldap field is used to display names as results?  Can it be configured?  For some reason, our database does not have a cn field.  Is this the problem?