I own a line 6 constrictor pedal. It supresses the sound well and has a built in noise gate.

Right now, I have my setup like this:

DSl50------Line 6 Pedal--------OD pedal-------Guitar

I get a buzz even when the noise gate is on. Not a lot, but when I turn my pedal all the way up you can hear it.

I then tried it like this:

DSL50-----------OD pedal----------Line 6 Pedal------Guitar

Then I got a sort of hissy static noise.

Which setup is correct? Does the Line 6 Constrictor come after or before the OD pedal?