Put the summary of the bug you're having here

*What I expected to happen was...: I would take the cobble out and put the iron in
Describe what you thought should happen here

*What actually happened was...: nothing happend.
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ... Put down a furnace.
3. ...put some thing in and then try to take it out... Not happening.