Triax Tri Link Problem

Hi there.
I was able to use my previous receiver in a second room by using a Triax Tri Link modulator & a magic eye.
Sadly my receiver gave up last week.
I purchased an Edision OS Mini Twin Tuner only to discover that it has no scart connection or RCA inputs.
So I connected a RCA to Scart adaptor to the Tri Link to send the signal to another room.
I have a perfect picture & I can change the channels.
The problem is that I can only barely hear the sound & there is terrible static noise in the second room.
The Tri Link was set to channel 36 & I kept changing it to different numbers between 1 & 69 but the static is still there.
Am I doing something wrong?