I'm using Unleashed and while there are multiple (different) item IDs for copper and tin, I believe there is only 1 item ID for iron. Ditto the chest, glass, and basic processor.
However, please verify the item IDs are as vanilla as possible. You may have a mod that adds a new/different item ID that the AE recipe doesn't recognize.
Also, please check your AppliedEnergistics.cfg and make sure the ME Drive / ME Chest are enabled.