I installed MindCrack and Flan's mod, now it goes into a black screen after loading the mojang screen, here's the console log when it started turning red if that helps:
Code:
2013-04-05 18:51:54 [INFO] [STDERR] Exception in thread "Minecraft main thread" java.lang.VerifyError: (class: co/uk/flansmods/common/FlansMod, method: load signature: (Lcpw/mods/fml/common/event/FMLInitializationEvent;)V) Incompatible argument to function
2013-04-05 18:51:54 [INFO] [STDERR] at java.lang.Class.forName0(Native Method)
2013-04-05 18:51:54 [INFO] [STDERR] at java.lang.Class.forName(Unknown Source)
2013-04-05 18:51:54 [INFO] [STDERR] at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:418)
2013-04-05 18:51:54 [INFO] [STDERR] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
2013-04-05 18:51:54 [INFO] [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2013-04-05 18:51:54 [INFO] [STDERR] at java.lang.reflect.Method.invoke(Unknown Source)
2013-04-05 18:51:54 [INFO] [STDERR] at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
2013-04-05 18:51:54 [INFO] [STDERR] at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
2013-04-05 18:51:54 [INFO] [STDERR] at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
2013-04-05 18:51:54 [INFO] [STDERR] at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
2013-04-05 18:51:54 [INFO] [STDERR] at com.google.common.eventbus.EventBus.post(EventBus.java:268)
2013-04-05 18:51:54 [INFO] [STDERR] at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:153)
2013-04-05 18:51:54 [INFO] [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2013-04-05 18:51:54 [INFO] [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2013-04-05 18:51:54 [INFO] [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2013-04-05 18:51:54 [INFO] [STDERR] at java.lang.reflect.Method.invoke(Unknown Source)
2013-04-05 18:51:54 [INFO] [STDERR] at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:69)
2013-04-05 18:51:54 [INFO] [STDERR] at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
2013-04-05 18:51:54 [INFO] [STDERR] at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
2013-04-05 18:51:54 [INFO] [STDERR] at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
2013-04-05 18:51:54 [INFO] [STDERR] at com.google.common.eventbus.EventBus.post(EventBus.java:268)
2013-04-05 18:51:54 [INFO] [STDERR] at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:86)
2013-04-05 18:51:54 [INFO] [STDERR] at cpw.mods.fml.common.Loader.loadMods(Loader.java:494)
2013-04-05 18:51:54 [INFO] [STDERR] at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:161)
2013-04-05 18:51:54 [INFO] [STDERR] at net.minecraft.client.Minecraft.a(Minecraft.java:412)
2013-04-05 18:51:54 [INFO] [STDERR] at asq.a(SourceFile:56)
2013-04-05 18:51:54 [INFO] [STDERR] at net.minecraft.client.Minecraft.run(Minecraft.java:746)
2013-04-05 18:51:54 [INFO] [STDERR] at java.lang.Thread.run(Unknown Source)