rfid tag antenna not resonating

I have designed a rfid tag antenna 13.56 MHz (hexagonal spiral antenna) but the problem is it's not resonating. How can i make it to resonate? Need Help Urgently.

Can you provide more information about the antenna?

the antenna is a simple inductor coil. I am attatching the picture of the antenna.

You screenshot shows many simulation errors. Are you sure that your simulation runs correct?

I validated my model in ansoft designer, everything was OK. Can u plz guide which tool will be easier to use to design tag antenna.And how can i introduce capacitive behaviour in my tag antenna , so that it resonates.