Problem with wave port

Hey,
I'm trying to design a fractal patch antenna. The patch is fed by a direct-connected probe.
However, on running the design, I get the following error message:

[error] Port refinement, process hf3d error: Port 1 is assigned to an
internal face. Only allowed with lumped ports..
[error] Simulation completed with execution error on server: Local
Machine.

Now, I don't understand why this problem arises. I tried the following things:
1. Ensure that the coax is outside the radiation box.
2. Ensure that the wave port is assignment to the outer side of the circle defined as waveport.

hfss file can be found in the following link: https://docs.google.com/file/d/0Bwar...it?usp=sharing

However, it does not work. I saw a couple of other threads on this topic. However, could not find anything useful.
Can anyone please help me out. Its super urgent. Thanks a lot in advance.

Hf3d error - Apply Lumped port. follow the steps. 1. Assign Lumped ports
2. Select the options new line. 3. draw the line at the circle, you will get an arrow mark.
now check and run.