Menu item datasource to SSRS report

Hi,

So it is not that hard to create a new SSRS report with VS, based on a query (new AOT query which contains only the CustTable) from Dynamics AX 2012. Now for testing purposes: create a new form, use a grid and the new query. Tie the components together via properties. Create a new output menu item which points to your new SSRS report and place the menu item on a the form. Remember to set the datasource property of the output menu item.

All is well....but when I run the form and hit the button to start my report: no filtering on the data is shown within the report, the selected customer (in the starting form) is not even selected (in the report) as what I expect would happen...

Please, can someone tell me if datasources can be passed (via an output menu item) to a SSRS report? And if so, what data method must I create in the SSRS report to actually do something with the parameter?

Thanks in advance,

byteway