Windows .jar issues with direwolf20 1.6.4 modpack

[AlterBix]

hello and thanks for supporting, i have a weird issue with direwold20 modpack version 1.6.4, the issue is that when i start the game works fine(i guess) then i join a world and a play for 10- 60 mins till it close, exactly, just closes no crash error or something, sometimes it happens when a kill a random entity, well no more words here the log, thanks in advance

http://pastebin.com/8B3Yf3HX

 

[RealSketch]

This bit here:
2014-02-02 11:04:07 [Información] [STDOUT] ---- Minecraft Crash Report ----
2014-02-02 11:04:07 [Información] [STDOUT] // Don't be sad, have a hug! <3
2014-02-02 11:04:07 [Información] [STDOUT]
2014-02-02 11:04:07 [Información] [STDOUT] Time: 2/02/14 11:04
2014-02-02 11:04:07 [Información] [STDOUT] Description: Exception in server tick loop

Problem in green!
Should be easy to fix, try adding Java Parameters (Link below on how to add them
http://forum.feed-the-beast.com/threads/jvm-arguments-for-modded-minecraft-updated-12-30-13.28994/
If that doesen't fix the problem try scrolling through this thread:
http://www.minecraftforum.net/topic...goutofmemoryerror-gc-overhead-limit-exceeded/
Just a quick google.

 

[AlterBix]

well thanks for try but it didn't help if i use parameters, launcher takes to long to start, and modpack doesn't even start thanks anyway