Button to expand view by category up to certain level, still not working

I have a view called product, it has the following columns:

Year Quarter Region Product Invoices Sales

2006

   Q1

                Eastern

   Q2

                Eastern

                Western

                Southern

                           Volvo

                           BMW

                           Toyota

                                      Inv 1  USD20K

                                      Inv 2  USD30K

All first 4 are categorised columns:

i have the following formula created, but don’t know why it does not work:

@Command([ViewCollapseAll]) ;

@Command( [OpenView] ; “Product” ;“Toyota” );

@Command( [ViewExpandWithChildren] )

What I wanted is actual for the view to expand up to level 3, i.e product, but I don’t know how to specify the category, as the column refers to field ProductField.

Any help very much appreciated, tq in advance.