Talk:Raw Carbon Fibre/@comment-94.215.212.113-20120714125455/@comment-5523959-20121204182858

By the date on your comment, you had an earlier version, which means that the version you had, could have been bugged for Energy Crystals.

Or it could be that you are on a SMP Server, in which case they are most likely banned as they are a relatively powerful object. (Energy Crystals are often banned because of their use to make other "Overpowered" items (e.g nano armour, lightsaber). However, I have not had a problem, perhaps this is due to your version of Tekkit, I don't know.