Thanks for not posting this in its correct place! Thanks, also, for not telling us what OS you are using. You're right, it isn't important at all. Especially because it is directly related to this problem.
I am going to assume you are on a Mac. I am also going to assume you don't have the latest launcher (found here http://www.technicpack.net/tekkit/ ). If you do already (or after you get the new launcher) nuke your .techniclauncher/tekkit folder and try Tekkit again.