Error enable Dutch language Pack CRM 4.0 (KB948604)

When you try to enable one or more language packs in CRM 4.0, you will receive the following error:

After installing Update Rollup 3, you will still get the error, so please install kb948604 to solve this issue.

See article id 948604
Error message when you try to provision a language in Microsoft Dynamics CRM 4.0: "Cannot insert duplicate key row in object 'dbo.LocalizedLabel' with unique index 'ndx_LocalizedLabel_ForSingleSelect'"