ComponentRenderer in Vaadin grid: grid is empty

Hello;

When I use ComponentRenderer to be able to display Combobox in grid, the grid appears empty ! And if I did not use the ComponentRenderer, then the combo box will not be displayed in the grid.

The userd vaadin version is 7.6 so I downloaded ComponentRenderer version 1.0.3 and I tried really previous version which could be compatible with vaadin 7.6 but the problem the same.

Below is the used code:


		Object itemId = container.addItem();	
		container.getContainerProperty(itemId,"ID").setValue("1");
		container.getContainerProperty(itemId,"Dependent MPI").setValue("200.300");
		container.getContainerProperty(itemId,"MPI Type").setValue("Antenna");
		container.getContainerProperty(itemId,"Approval").setValue(ApproveReject);
		this.getColumn("Approval").setRenderer(new ComponentRenderer());	

I hope if someone can help me and direct me for the reason.

Kindly find the attachments.
Regard
Bilal
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