R trigger button not working.

[thebonuslevel]

Hi, so I finally got a chance to sit down and assemble and load up some games via a wifi dongle and my right trigger doesn't work. Its not an issue of clearance with trigger buttons as it doesn't work with the shell off, the tactile button it self is not working. It clicks, but no response. Neither in the retropie menu or the various snes emulators.

Am I overlooking something, is this a software issue or is this thing just borked?