multi value report dataset parameters

Hi,

I'm trying to create cascading parameters for an AX 2012 report where all the parameters can have multiple values. Similar to the link below but for AX 2012 using VS 2010. https://community.dynamics.com/product/crm/crmtechnical/b/crmcustomereffective/archive/2010/09/08/ssrs-58-working-with-multi-value-parameters.aspx?ref=rc-a

I can create the cascading parameters but I can't make them all multivalue.

The issue I'm finding is that the parameter for the dataset has multivalue = False and I can't change it to True.

Is there a way around this?

Thanks.