Troll Craft Problem

My friend and I really love playing Trollcraft. Then randomly it wouldn't let me join. I'd load up troll craft and when I click on it, it takes about 30 seconds and then it just kicks me back to AT launcher (the launcher that has the troll craft mod pack). It just randomly started happening and the game works for my friend, and the other computer (I don't use that computer because I have my recording equipment and I like my laptop better than computer). Please help me.

Thank you problem fixed, it was a glitch with secret rooms mod thanks again!