Can't find add-in component when adding new item to the project

Hi,

I'm trying to creating a add-in toolbar with ArcObject 10.1 and Visual Basic.Net 2010. I first create new project and then trying to add a toolbar through "Project> Add New Item> Add-in Component". However, there is no any options under "ArcGIS" node （As shown in the following figure):
Attachment 34036

Can anybody tell me how to cope with the problem.

Thanks.

Arlene

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