Horizon and Direwolf20 (1.6.4) don't work for me

[quentinwolf19]

Mod Pack: Direwolf20
Mod & Version: 1.6.4
Pastebin link to crash log: http://pastebin.com/vDBs5Gn5
Whats the bug? The game starts off fine but after about 5 minutes the game begins to stall more and more frequently until it becomes unplayable. If I try to quit it freezes and says shutting down internal server.
Can it be repeated? Yes. it has happened 4x now. While it stalls the console reads each time: [WARNING] [Minecraft-Server] Can't keep up! Did the system time change, or is the server overloaded?
Known Fix:

 

[Finishigor]

You running out of memory, had same problem. Follow the small guide at http://forum.feed-the-beast.com/threads/suggestions-1-6-4-packs-for-32-bit-os.35875/ and you should be fine.