Import Outlook .ics into Zimbra Calendar

[curio]

Hey everyone,

I've just discovered Zimbra Desktop today and am really happy to find a viable Outlook alternative! Maybe you guys can tell me what I'm doing wrong here:

I tried to save my Outlook calendar into an .ics file and imported it into Zimbra Calendar. Although the events do show up in Zimbra, all of them are shown simply as "busy" with all names/descriptions stripped out. Is this just the way it is because of compatibility issues with Outlook or did I do something stupid?

I'm running Windows 7 x64; might that be the reason?

Thanks for any help!