I have the following code and my toolbar disappears on hide, show of the form.

Code:
	EditorGrid<ModelData> grid = new EditorGrid<ModelData>(store, new ColumnModel(configs));
	grid.setHeight(200);
	grid.setAutoExpandColumn("description");
	grid.setBorders(false);
	grid.addPlugin(checkColumn);
	grid.setAutoHeight(true);


	// Create grid container
	ContentPanel cp = new ContentPanel();
	cp.setTopComponent(toolBar);
	cp.add(grid);
	cp.setWidth("100%");
	cp.setHeaderVisible(false);
	cp.setAutoHeight(true);
	
	form.setWidth(800);
	form.add(cp);
Am I doing something wrong ?

I attach a screenshot of the layout:
sencha.png

Any tip?