Same as 'NIM005106: Granting 2 identical Oracle roles with the "Select" permission to a user will cause Layers to dissappear in ArcCatalog 9.2 Final.'
対処法
Remove the role or remove the direct object grants and it will show up in the table of contents.GH 2/15/2007 - this is a duplicate of CR44133 that has already been fixed in the 9.3 and 9.2 SP2 builds.