Error in SQL 2005 when create diagram

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SQL-Server

I could not create diagram in SQL Server 2005, it show message:

The specified module could not be found.
(MS Visual Database Tools)

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Program Location:

at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.VirtualProject.Microsoft.SqlServer.Management.UI.VSIntegration.Editors.ISqlVirtualProject.CreateDesigner(Urn origUrn, DocumentType editorType, DocumentOptions aeOptions, IManagedConnection con)
at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.ISqlVirtualProject.CreateDesigner(Urn origUrn, DocumentType editorType, DocumentOptions aeOptions, IManagedConnection con)
at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.ScriptFactory.CreateDesigner(DocumentType editorType, DocumentOptions aeOptions, Urn parentUrn, IManagedConnection mc)
at Microsoft.SqlServer.Management.UI.VSIntegration.Editors.VsDocumentMenuItem.CreateDesignerWindow(IManagedConnection mc, DocumentOptions options)