Problem with Agrarian Skies Server

I would like to Agrarian Skies server, but I can not run as it starts and then the server stops. I get this in the console:
2015-02-10 19:42:16 [INFORMACIÓN] [ForgeModLoader] Forge Mod Loader version 6.4.49.965 for Minecraft 1.6.4 loading
2015-02-10 19:42:16 [INFORMACIÓN] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_31, running on Windows 7:amd64:6.1, installed at C:\Program Files\Java\jre1.8.0_31
2015-02-10 19:42:16 [DETALLADO] [ForgeModLoader] Java classpath at...

Problem with Agrarian Skies Server