ok, is that what I said would cascade parameters the most appropriate way to work, but if you only want to filter my report with the parameter supplier and do not want to work with the parameter mark, as you would. It would also in this way if I want to work with brands without selecting the suppliers to suppliers. What I'm looking for with the boolean parameter is that if I give Yes, my parameter is activated Supplier, and if I give the parameter is not deactivated supplier. When I give Yes, I'm passing Provider parameter, when I give not say I'm passing an empty set.
Thanks before hand, Michael and Robert, I appreciate very much your help.:-D