lumped port problem in cpw slot antenna

hi,
i am trying to attach a lumped port with cpw slot antenna but it is not occurring properly,i have attached the file in hfss also paper which i want to follow.if any one can help me it will be great favour.
also if someone has worked on slot antenna then plz tell me in order to make slot i should subtract slot rectangle from ground plane and in subtraction i should check clone tool object or not?