Java problems: Have you restarted computer.
Tekkit stuff: Just keep restarting, I had that for a while. Twenty restarts later, it worked. Fun times.
Other stuff: Tekkit server is staying up for right now, but what I really wanted was the industrial bits. Tekkit just had those, and looked cool. I don't like pieces of it, so I will be moving to a modpack that is actually what I want. If someone else wants to host the tekkit server, I can give you the map and everything. It requires forwarding a port to the computer it's running on, and then just running it.