Sharepoint / Silverlight issue

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Silverlight

SharePoint

Im working on application development using SharePoint 2010.
On click on each ribbon tab, the corresponding ribbon buttons with grouping should be displayed and respective pages should be displayed.
We are using SharePoint out of the box Ribbon UI for navigation and Silverlight web part for a gird and also for modal dialog on the click of ribbon buttons.
The issue is :
•There is no simple way that could be figured out for displaying the grid (Silverlight webpart) when some tab in Ribbon is clicked.
• Also when clicking on check box in grid (Silverlight web part), how to enable the one or more ribbon buttons in Ribbon tab.

Do help me with the same.