Borderlands ps3, how to through the closed gate to meet Crazy Earl at scrapyard?

I'm trying to deliver the 10 scrap food cans or something to Crazy Earl at scrapyard but on getting there, I can't get access to meet this dude because of the locked gate there. Any clue on how to go beyond that gate or what am I missing?|||If you are at the spot I am thinking of there should be a large gas-container near the door, just shoot it (make sure to stand back a bit) and it will explode and open up. If this doesn't work try going around and check your map you may be in the wrong spot.