buzzing and loss of volume with my pedal set up

buzzing and loss of volume with my pedal set up

Hello ,
I want to know if anyone had any suggestions to my problems with my
pedal board. Here is the problem, I have buzzing, even though I have a
noise reduction pedal and a loss of volume, but no loss when the guitar
plugged into the amp by itself or maybe with one or two pedals.
Here is my gear.

1) Fender American Standard Stratocaster
2) Beheringer GMX-110 30 watt Amp
3) Oscar Schimdt OE-30 Delta King ( my other axe)
4) Electro Harmonix Q-Tron
5) Boss BD-2 Blues Driver pedal
6) Boss SD-1 Super Overdrive pedal
7) Boss DS -1 Distortion pedal
8) Boss NS-1 Noise Suppressor pedal
9) Rocktek Delay pedal
10) Line 6 Space Chorus pedal
11) Line 6 Verbzilla pedal.

So if anyone could give any suggestion on what may be wrong or the
proper way to hook this up, I would really appreciate the help.

Thank you
Tiedye John