Help simulating cavity filter with HF55

I modeled a product cavity BPF filter:pass band is between 6G and 7G.

But I simulated it in HF55,and S21<-600dB from 0.5G to 12G.

The below is my project.
Pls check my drawing , port/boundry setting and solve parameter setting.

Pls tell me how to correct it if you find my faults.

Thank you!

Hi,
I have found my mistake in the material setting.
Object1 is vacuum,but I wrongly set it be copper.