Running different reports depending on a params from a form

Hi there I would like to be able to run differen reports in the CustInvoiceJour form(button Show) i placed a new field in the CustInvoiceJour table which is enum type , so in hte form it is a drop down depending on the value from it i would like to be able to run different reports(variations of the SalesInvoice report). I have 3 action menu items(connected to the MenuItemBuutons in the Show button on the form) all of them call a class. In the class i have the selected value but the reports are not running its just that nothing happens.

static void main(Args _args)
{
myReportRun myRep;
myRep..lastValueElementName();
if (myRep.prompt())
{
myRep.run();
}

The class lastElementValueName overriden and initFromArgs method and when debugging it works ok up to the point when it should run,,,,,,If anyone has any idea what the problem is...please help me.