Tekkit crashes, but vanilla MC works. It loads something, then it generates random numbers.

[jimiman67]

Like I said in the title, the launcher loads for a few seconds, then generates a mess of random numbers and letters and brings back the launcher menu. I've tried uninstalling and reinstalling, but to no avail. 

[Curunir]

Please take all issues to the tracker. I also recommend you follow tracker rules and include >crash logs, so we have a chance to find the source of your problem.