If it says Failed to login: bad login it means you have not got the paid version of minecraft. You gotta go to server properties and open it with notepad. Change the online mode=true to online mode=false.
I put down my quarry on my Tekkit sever and then i put 1-2 steam engines and power them. They move in the in-out motion but the frame of the quarry just wont start build. I have tried with Redstone engines aswell.