something wrong in far field pattern result when using near field source

Dear all,

I have an exercise which I would like to extract near field from a horn antenna and import to another simulation (all in FEKO platform), then there is a weird result shown in the video as below link I just uploaded:

https://drive.google.com/file/d/1-NGAV75rxH2zKfahMF4qN6I2l8BpKN8c/view?usp=sharing

 You can see the far field pattern with near field source I imported is completely opposite to original one. I would appreciate if anyone can show me how to simulate correctly.

BR/Marcus