what gas will this B B Q require.

having put the Laguna BBQ together,which is not a 1 hour job.
I tried to fit the regulator to my large tank of gas, surprise surprise
it would not fit. So I fitted my old regulator to the Laguna BBQ,
It came alive using the ignition system right away,there was one problem,
the side burner had a sooty yellow flame.I tried to ring the help line.
It was like trying to speak to GOD, no joy. So after speaking to friends and staff at B and Q ,i decided to change the regulator back and trade in a full Blue tank in exchange for a large Green tank,cost £ 27, I had to forget about the gas in the blue tank. I fired up the B B Q , I still have a side burner with a yellow flame. HELP.