can somebody tell me which .dll file needs to be registered, and why the installation routine didn't do this for me?

07-05-10 23:31:54 0 Processing incoming Free/Busy request
07-05-10 23:32:23 3 Returning Free/Busy status
07-05-10 23:35:53 3 Message 1: GWOUT: Processing Busy Search
07-05-10 23:35:53 3 Message 1: Filename-0c326c4c.R60 FileSize- 1.7KB
07-05-10 23:35:53 3 Message 1: Message ID-4C32A575.A8B:117:41032
07-05-10 23:35:53 3 Message 1: From: GWDOM.GWPO.gwtestuser
07-05-10 23:35:53 3 FreeBusy DLL is not registered. Register using regsvr32
07-05-10 23:35:53 3 Message 1: TO (Active): First Organization.First Administrative Group.extestuser Completed
07-05-10 23:35:53 3 Message 1: Busy Search: Completed