Can't use Facade's

they show up in inventory good but when in hot bar it says its broken

MC Version: 1.6.2 SMP

BuildCraft Version : 4.0.1

In Inventory:

On HotBar:

I tested this and they are working perfectly fine for me with the latest source. Either they have been fixed already (unlikely) or there is some other problem on your end.

Are you sure your client's config files match the server's?

yes i'm sure