You're gonna want to describe the problem to me, as well as grab your starbound.log from (Starbound>storage>starbound.log).

I only need the first, unnumbered starbound.log! Please open it and copy all the contents. If you would please, go to pastebin and post it there. Then you can grab the link to it and post it here!

With a description of the problem and the log, I'll do my best to solve the issue!