Behringer X-18/XAIR ect, HI-Z input with unbalanced cable tons of noise!! help acoustic/electric combo?

I am using an unbalanced 1/4 TR cable and also have a balanced 1/4 TRS cable. When plugged directly into an acoustic amp it sounds great with the unbalanced cable. Once I plug into the mixer I can get no sound from the TRS cable on any input (I assume this is because of the output level conversion) But with the 1/4 TR unbalanced cable plugged into the HI-Z input number 2 I get an extreme amount of noise and buzz. With and without phantom power..

I am under the impression that inputs 1-2 have basically built in DI boxes for this exact reason.

Can someone elaborate on why a TRS cable on input 2 works with an electric but not an acoustic electric combo at all and why a TR cable would have so much noise on a channel that is supposed to be high impedance.

Bottom line what do I need to change to be able to get a clean acoustic guitar with electric pick up sound into the x18

Based on the manuals I am doing everything correct and the fact I have tried with multiple cables tells me its not a cable issue but a setting of some kind on the mixer or I shouldn't be using inputs 1 or 2..