Talk:Stone Wall/@comment-8477240-20130421002717

I'm having some trouble with this. I'm able to craft and place the original stone wall but I am unable to upgrade it. I live in a miner's camp surrounded partically by stone wall but I want to completely surround it. I'm able to upgrade the tier 3 walls it came with but when I place more walls to add on I'm unable to upgrade them. Help?