Create a PassingURLParameter variable and assign the value into that for REPORT PATH GO TO the report Cell--> Go to its properties and select Action Property----> then Write down the following code into that.
="javascript:void(window.open('"+Globals!ReportServerUrl +Parameters!PassingURLParameterName.Value+"&Parval="+Right(Fields!parameter.UniqueName,Len(Fields!parametername.UniqueName )-23)+"&rc:Parameters=false&rc:ToolBar=false&rc:addressbar=false','welcome','width=310,Height=250,location=yes,status=no,toolbar=false,Vscrollbar=Yes,Hscrollbar=No,menubar=no,screenX=500,screenY=200,left=600,top=200'))"
