Mackie vlz1604/twin impact hiss ?!

Yo

About a month ago my twin impact interface my stopped working until i figured out I needed to do use the patchbay routing in the software.

Ever since that it needs a higher input level to reach a proper signal to record in ableton.

That means I need to turn my mixer, mackie vlz1604 a bit higher and that has resulted in hiss/noise.

This is very frustrating. Everything i record has this hiss on it, fuckin frustrating. I tried a lot of different solution but nothing has worked.

Does anyone have the same problem.

Cheers