I am installing Zimbra Desktop beta2 on Ubuntu Hardy. Installation went fine and now I am at the Zimbra Account Setup screen.

When I try to set up my Zimbra account (mail.01.com) and hit "Save Settings", a red, bold error(?) message appears at the top that reads "invoke mail.01.com".

Trying my Yahoo Plus account yields the message "error communicating with server".

Trying a standard POP/IMAP account yields the messages "pop.1and1.com" and "imap.1and1.com" respectively.

That's it, no indication of what is going on. Any help will be much appreciated and hopefully help the next person.