I am stuck at a point in the big dig tunnels. Everytime I press E to send Mel's robot to blow it up, nothing happens. I reloaded the game, and tested if it was the key by using it on the other people. I was able to pick stuff up and talk to others but everytime I go to activate this wall, nothing happens. I really need help. (Point in the tunnel is right after the brewery basemant) . Please help.

I haven't gotten there yet, but I have to say - it's really appropriate for someone to get stuck on the Big Dig. Hopefully you'll get past it sooner than Boston did in real life.

What haha?