ارور هنگام ایجاد Database Diagrams

[rezatemor]

سلام هنگام ایجاد دیاگرم این پیغام خطا میاد لطفا کمک کنید
حتی دو بار نصب کردم از اول اما دوباره همین پیغام میاد:متفکر:


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Invalid class string (MS Visual Database Tools)
------------------------------Program Location:
at System.Runtime.InteropServices.Marshal.ThrowExcept ionForHRInternal(Int32 errorCode, IntPtr errorInfo) at Microsoft.SqlServer.Management.UI.VSIntegration.Na tiveMethods.ThrowOnFailure(Int32 hr) at

Microsoft.SqlServer.Management.UI.VSIntegration.Ed itors.VirtualProject.CreateDesigner(Urn origUrn, DocumentType editorType, DocumentOptions aeOptions, IManagedConnection con, String fileName) at

Microsoft.SqlServer.Management.UI.VSIntegration.Ed itors.VirtualProject.Microsoft.SqlServer.Managemen t.UI.VSIntegration.Editors.ISqlVirtualProject.Crea teDesigner(
Urn origUrn, DocumentType editorType, DocumentOptions aeOptions, IManagedConnection con, String fileName) at

Microsoft.SqlServer.Management.UI.VSIntegration.Ed itors.ISqlVirtualProject.CreateDesigner(Urn origUrn, DocumentType editorType, DocumentOptions aeOptions,
IManagedConnection con, String fileName) at Microsoft.SqlServer.Management.UI.VSIntegration.Ed itors.ScriptFactory.CreateDesigner(DocumentType editorType,
DocumentOptions aeOptions, Urn parentUrn, IManagedConnection mc, String fileName) at

Microsoft.SqlServer.Management.UI.VSIntegration.Ed itors.VsDocumentMenuItem.CreateDesignerWindow(IMan agedConnection mc, DocumentOptions options)


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