Tekkit crashes when joining

[Rainythunder]

Whenever I join my brothers server it crashes. It didnt in the beginning. It works to play single player and on other servers. I have tried to reinstall it but ut does no good. And he has tried to restart the server and it doesnt work. Hope someone can help me.

 

 

Edited September 30, 2016 by Munaus
massive wall of text deleted

[JaariAtmc]

Dear god, use pastebin >.> @Munaus

Also, update your AMD Catalyst. https://bugs.mojang.com/browse/MC-31618