i need help in HFSS, problem with patch antenna simulation results

Hi everybody,
i designed a replica of patch antenna in HFSs and am trying to match the simulation results with the network analyzer results from the real antenna. Currently the results i get from HFSS simulation are totally different and are not making any sense, to me at least. lol
i mean i know it wont be exactly the same but it should be similar. At this point am not bothered about the performance of the antenna i just want to make sure that what i am simulating is actually correct.
I am really new to HFSS , so am not sure if i am doing something wrong in design or in analyses stage.

antenna information:
- frequency range: (800Mhz- 1Ghz).
- solution frequency: 866Mhz

*results from network analyzer , from the actual antenna (S11@866Mhz):

Log Magnitude = 5.27 dB
VSWR = 3.38
Impedance @868 MHz = 19.05 + 25.88i

Here is the link to the simulation files and the actual antenna:
https://www.edaboard.com/threads/286003/

I hope someone can help me out and tell me what am i missing or doing wrong, and tell me how to fix it .

Thank you

please can someone help me .

thank you

hi sameer,
i also designed antenna in hfss can u help me...

hi,
am not sure if i can , i am new to HFSS my self .lol
but anyway , what is your problem?