Need help from master built owners!

Well I'm in a pinch. I bought a master built, dual fuel propane smoker/ twin door, a month ago to do some ribs. Everything went well enough aside from the flame adjustment being a little cantankerous but it did its job. Now however, I went to light the burner and after one pitiful flame I got nothing.  zip! NADA! 

Steps i have taken: tank is full, swapped regulators, made sure burner holes are clear, lines are good.

What gives?!? Anyone have any ideas?



This is the only flame I got...