Versions of BizTalk Server 2004 product updates that were released before January 2005 do not perform language version checking. Instead, they set the language version of BizTalk Server 2004 that is stored in the registry to the same language version as the update that is being installed.
All BizTalk Server 2004 product updates that have been introduced after January 2005 perform language version checking. These updates will not install if the language version of BizTalk Server that is indicated in the registry does not match the language version of the update. This issue persists even if the mismatched update is subsequently uninstalled.
Article ID: 895294 - Last Review: 24 Mar 2009 - Revision: 1