Y U BE OUT OF MEMORY?!?!?!

2013-07-31 19:08:44 [INFO] [STDERR] Exception in thread "Minecraft main thread" java.lang.OutOfMemoryError: PermGen space
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.lang.ClassLoader.defineClass1(Native Method)
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.lang.ClassLoader.defineClass(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.security.SecureClassLoader.defineClass(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.net.URLClassLoader.defineClass(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.net.URLClassLoader.access$100(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.net.URLClassLoader$1.run(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.net.URLClassLoader$1.run(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.security.AccessController.doPrivileged(Native Method)
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.net.URLClassLoader.findClass(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:160)
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.lang.ClassLoader.loadClass(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.lang.ClassLoader.loadClass(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:500)
2013-07-31 19:08:44 [INFO] [STDERR] 	at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.lang.reflect.Method.invoke(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
2013-07-31 19:08:44 [INFO] [STDERR] 	at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
2013-07-31 19:08:44 [INFO] [STDERR] 	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
2013-07-31 19:08:44 [INFO] [STDERR] 	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
2013-07-31 19:08:44 [INFO] [STDERR] 	at com.google.common.eventbus.EventBus.post(EventBus.java:267)
2013-07-31 19:08:44 [INFO] [STDERR] 	at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:192)
2013-07-31 19:08:44 [INFO] [STDERR] 	at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:172)
2013-07-31 19:08:44 [INFO] [STDERR] 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2013-07-31 19:08:44 [INFO] [STDERR] 	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at java.lang.reflect.Method.invoke(Unknown Source)
2013-07-31 19:08:44 [INFO] [STDERR] 	at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
2013-07-31 19:08:44 [INFO] [STDERR] 	at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
2013-07-31 19:08:44 [INFO] [STDERR] 	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
2013-07-31 19:08:44 [INFO] [STDERR] 	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
2013-07-31 19:08:44 [INFO] [STDERR] 	at com.google.common.eventbus.EventBus.post(EventBus.java:267)