Gynwaith

This sounds like the same problem that I'm having. It only happens with Tekkit classic, technic, and hack slash mine, but the rest seem to work. I get to the mojang screen then it just closes, no error or anything it just exits.

My Technic launcher runs just fine and I can choose between the different versions to run and such. But some of them work and some don't namely the only one I care about is Tekkit and it doesn't work. When I select it and click "Log In" it runs like it normally would and opens a separate window to start running in. The only thing is it gets to the Mojang screen and stays there for a few seconds and then it just closes. There isn't even an error or anything, it just closes. I've tried uninstalling and reinstalling countless times. This issue also occurs with Technic and HackSlashMine. Anyone know what might be wrong with it?

I just downloaded and installed Tekkit Classic. The technic launcher loads just fine, but once i click log in so I can run tekkit, it gets to the mojang screen and closes. It doesn't have any errors or anything, it just closes. Also it wont let me run a tekkit server, when I click to run it it sets up the property file but other than that nothing will happen. Am I missing something?