outlook ldap 0x80070057

Hi I am hoping someone else has run into this. Upgrading from outlook 98 to XP.
When I go to add an LDAP directory service, it starts, but when I click on more settings I receive a popup
Microsoft Outlook
An unknown error occured, error code: 0x80070057.

Windows xp is current on patches, Office xp is current on patches. IE and outlook
express are installed. Outlook 98, Add-in Microsoft LDAP, Office 97sp2 have all
been uninstalled.

Thanks in advance
Michelle