I computer and mixer, internetradio station

Hello,
I am testing now the breakaway broadcast compressor.
I have radio automation software for the music and all that and last days i have been testing to broadcast and compress "What u hear" with the breakaway compressor and that works just fine and i love it.
Now i am dealing with another test. Now i have add mixer to this concept so i can use microphone to talk and add more stuff to the mixer and everything ends in the brekaway compressor and after that it goes on air.
What my problem is:

The radio automation software is using the output plug on the soundcard and goes there to the mixer, in the mixer there is microphones and more stuff. After the mixer the line out of the mixer goes to line in on the soundcard, and the breakaway is set to broadcast the "line in" input.
What the problem is that after brekaway compress the sound it send it back out to the soundcard to the mixer (the same output that the radio automation software use)
That makes crazy annoying loop because then the breakway is compressing the same sound over and over again.
How can i set it up if i dont want to hear what breakaway is doing, i just want to mute that because i am listen to the mixer, not the sound after the compreesion. Because breakaway is in the same computer that the radio automation software. I have alredy mute line in feature in the audio output settings of the soundcard but i still can hear what breakaway is doing 🙁