Questions about S22 calculation of frequency tripler in ads simulation

hello, i'm simulating one frequency tripler in ads using simplecoupler to calculate S11 and S22. As shown in the figure, port 1 injects a large signal of RFfreq, RFPwr and port 2 injects no signal. i use S11=HB.RF_refl[1]/HB.RF_in[1] to get the right S11, but S22=HB.RF_out[3]/HB.RF_outref[3] gives the wrong S22. I consider port 2 injects no signal and RF_outref[3] is the input power to port2 while RF_outref[3] is the reflected one. Could someone tell please where am I wrong? thanks for your response.