Getting weak input signal when trying to sample from turntable

So I have a Stanton STR.150 routing into my Stanton M.207 mixer, which is then routed into the CD in on a marantz amp and sounds great through speakers. I am then connecting from the recorder outputs on the amp into the line inputs on the Maschine. With the mixer going into the red Im still having to set my threshhold to -52dB to even detect any input. When I then try and sample it predictably sounds really quiet and muffled. Every other combination of input into amp and even direct into Maschine from turntable or mixer result in the same weak input. Can anyone advise what I might be doing wrong?

Cheers

Stewart