I have tried three times to get a pile of brush and trees to burn during the last 10 days. My neighbor who is a land improvement contractor got two other tree piles to burn completely last week, but mine just will not go. The brush and trees were taken down late last summer before the sap would have went to the roots if that has anything to do with it. We have tried piles of card board, diesel fuel, and engine oil to get this pile going. It burns for a while and quits. His dozer is still sitting there to push the piles in as they burn, just can't get them to go. Any time tested ideas??? Thanks.