Buildings Exploding

[pwnagenub2]

Whenever I try to make a tower for my TD, the building just explodes right when I click on the ground, and my builder gets to it.

I have no clue what is making this happen, this has never happened to me before, and I'm not doing anything different than I usually do.

Thanks

-Nevermind, I made the ground blight and it works now.

 

[WolfieeifloW]

Do you have any triggers?
What do you mean explodes?

 

[pwnagenub2]

Do you have any triggers?
What do you mean explodes?

I was just creating any other building onto the ground, and It'd show an explosion where I placed it, instantly(when my unit got to the desired place).

I fixed it now, though. I added blight and the towers weren't even undead.