Help Me Plz

[Yuhaney]

This is from the Walkthrough:
Combine the string and the bottle of Baxtrin in the inventory. Use the soaked string on the gun powder from the barrel. Go back to the place where you left the TNT...
Use the string (now it's a fuse) on the barrel, then use the lighter on the fuse and stay back!

You can find the gun powder in the storage (Inside of the barrel) behind the electric fence...