Sharepoint 2010 Lists not showing title all suddenly on adding or editing .

You have Sharepoint 2010. Everything was fine, until suddenly Lists are not showing title on editing or adding.. Even If you try creating new lists, same problem. Solution?

Go to main Site then:

Go to Site Actions Then Go to  Site Settings Then Go -->(Galleries) Site Content Types  

from  List Content Type, click on: Item  

-->Click on the "Title" under columns

 And then make sure you choose required.