Help me assign excitation in a patch antenna design with 10 Ghz

I am trying to design a patch antenna with 10 GHZ. Somehow I can't assign excitation to waveport or lumport.

Can you please help?

x = 69.12
y = 0
z = -15.88
dx = 18.12
dy = 0
dz = 15.88

Thanks a lot