How to create two different container in MasterPane?

I have to display two grids conditionally.
There is MasterPane with only one container Inside that container there is Grid node. Here I want to add another container at same level but system not showing option to new node as container.
So I created two child container of main container and inside them added child grid.
Both container are same just viewing condition is slightly different.
So when I compile code then I am getting error like "The name GridBand2 does not exists in current context".

I also changed controlId but no luck.