The lighting PROCESS involves HOLDING
" for QUITE a (long) WHILE...
To clear the AIR
out of your fuel line...
I have seen ... Up to 5 minutes
although I believe that is excessive)...
It is MOST LIKELY your troubles are procedural.
(READ the manuals)
is the place to START ...
locally on the internet...
Try (they have manuals here... also)
Blue Rhino Outdoor Gas Heaters
Hope this helps
Carnac the Magnificent