Go to download new launcher MYM :FTB Server - Advanced and Lag Free Feed The Beast Servers - MineYourMind 5.0
He has a bit of a streak going of nonsense comments (no offense neno ) Anyway I'm not very good at reading crash reports you are gunna have to wait for someone who can to come along. Sorry I couldn't help more
Looks like it's failing to render a block from the architecture mod. This might have multiple issues. First of all, please force update the modpack, to make sure it's not just broken mod data. If that doesn't work, I'd suggest reporting the bug to the mod author. We can then try to remove the offending block, but since the architecture blocks all use the same ID, we'll probably end up nuking half your house in the process. Do you have any idea where that block could be?
well if it is architect mod, 90% of my build is architect then my base is rip. Also why would that crashed me now, I've been building this base for weeks now and never really crashed me. Ill try and force update first and gives you guys an update. Edit* Wow force updating the modpack worked. Thanks Xfel11.