I need to add an attribute to an existing set of products which are already within an attribute set. When I go into the product after adding the neww attribute to the attribute set I can't see it in the product edit page? 

Is there any way to do this? maybe at database level? or an I missing something? 

Any help would be greatly appreciated,

Dave

**edit - sorry forgot to mention these are configurable products that the new attribute isn't working on**