Mechageno

Alright well here's the problem.This is a modpack i made called Battlemon, the modpack works fine for me and my friend. But two others that have been trying to play it lately, well it just doesn't work for them. The pack downloads just fine but once they get to the mojang screen it hangs there forever and stops responding(i tried getting them to wait like an hour to see if it would load). What's wierd is that this happens to 2 other people but not me and my friend. They get the same error(i've looked at the logs), they both use different versions of windows (7 and 8). I tried giving them my installation thinking theirs was corrupted but they got the same error. I have no idea why and I don't understand the error log so here's the log of what happens. http://pastebin.com/15M2FNrV