Half life 2 epi 2 help

[ButchGod]

Having troube getting past Antlion in chapter 2;I go left of where the Guardian entered the cave -- into another yellow, blood stained area for cover from its charge attacks. Wait for him to retreat, and then exit the tunnel again. Continue down the tunnel and ready your shotgun. While running, you are supposed to come across a boarded-up wooden passageway. This is in chapter 2 I can't find the passage-way. I've ran through the 2 tunnels at least 6 or 7 times.

[Thraxz]

I don't think that you go out the same entrance you go into. You keep going through it until it exits elsewhere and try to get there from that exit.