Findset in sales order list

Hi everyone,

I've included a button into the sales order list, to ship all the selected ordes, and send them to a printer. The code is this one:

//1890107-01
CurrPage.SETSELECTIONFILTER(SalesOrder);
CurrPage.SETSELECTIONFILTER(lSalesOrder2);
//lSalesOrder2.COPYFILTERS(SalesOrder);
IF SalesOrder.FINDSET THEN BEGIN
  CLEAR(BillToCust);
  BillToCust.GET(SalesOrder."Bill-to Customer No.");
  CLEAR(BatchPostReport);
  BatchPostReport.SETTABLEVIEW(SalesOrder);
  BatchPostReport.InitializeRequest(TRUE,FALSE,WORKDATE,TRUE,TRUE,TRUE);
  BatchPostReport.RUNMODAL();
  CLEAR(BatchPostReport);  
  COMMIT;  
END;

//imprimir
//CurrPage.SETSELECTIONFILTER(SalesOrder);
IF lSalesOrder2.FINDSET THEN REPEAT
  //lSalesOrder2.CALCFIELDS(Shipped);
  //IF Shipped THEN
    SalesPostPrint.Print(lSalesOrder2);  
UNTIL lSalesOrder2.NEXT =0;

If I run it from the server, works correclty. But the problem comes when we run it from a client´s laptop. If we just select one order, the findset for printing works correctly. But if we select more than 1 order, the findset isn't "finding anything".

I'm really suspreised because the behavior is different if I run the develepment in the server or in a laptop....

Any hint? Thank you very much