Passing multi-value parameter to sub report

Hey all,Been trying to find an answer online and not having much luck thus far. Basically I have a "dashboard" style report which allows the user to select multiple-values for a specific parameter. I then want that value to be passed to a support sub report by clicking a graph (via action). The problem is though, it's only passing the first value of the parameter: [i]=Parameters!Step.Value(0)[/i]What can be done to support sending all values of the parameter to the sub report?Thanks