Thanks that worked great.
I put buildcraft on the server and it works. But, it seems like it only works when the client has buildcraft installed as well. Is this normal.
I am running Ubuntu 12.04 with forge server. It works great, but where the hell is the mods folder so I can run things like buildcraft?
The sever has no .minecraft folder or mods folder anywhere. It created some files and folders in the directory where the minecraft_server.1.7.2.jar resides.