Tekkit Loaded once, and now doesn't

[JaceyB]

I installed Tekkit and it loaded up once, I created a world and opened it.

Closed it all, and now when I load Technic Launcher, I click launch, and it opens up a white screen and then closes itself. I've deleted all the files and tried to get it to work again, and it installs everything again but won't open anymore.

I'm using a MAC OS Mountain Lion. Please help thanks!

[oonami]

Yup. I'm running Windows 7 Ultimate and mine is doing the same thing too. .-.

All the other mod packs in the Technic Launcher seem to work fine though.