I created on site and working with work flows. I created reusable work flow. Now I want to associate that workflow with shared documents library. Whe I open the shared documents library in sharepoint desginer it is showing below message.

I closed the designer and again open it and clicked on the lists and libraries in the left pane. In the middle pane it is showing `
there are no items to show in this view.
I searched with similar type of questions in this site. But no one solve my problem. Thats why again asking it. Can any one faced this situation?
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