000992 : You cannot administer 9.2 or older versions of ArcGIS Server using ArcGIS Desktop version 9.3.

Description

Caching tools require administrative access to ArcGIS Server. You cannot administer 9.2 or older versions of ArcGIS Server using ArcGIS Desktop 9.3 and therefore, you will see this message.

Solution

Use ArcGIS Desktop 9.2 to work with services on ArcGIS Server 9.2