i have researched the issue to the best of my ability (searching full thing, strings, leaving out the mods i have installed) the issue started after i installed fml. i am quite new to minecraft so i apologize in advance if it is a simple fix. below is the error report from the minecraft folder. i read the "read or get banned" post but didnt quite understand it. once again, sorry....

 

---- Minecraft Crash Report ----

// You should try our sister game, Minceraft!

 

Time: 6/4/13 6:21 PM

Description: Failed to start game

 

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: com.jackos2500.BlockBreaker.common.BlockBreaker

at cpw.mods.fml.common.LoadController.transition(LoadController.java:142)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:513)

at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:160)

at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:410)

at net.minecraft.client.MinecraftAppletImpl.func_71384_a(SourceFile:56)

at net.minecraft.client.Minecraft.run(Minecraft.java:732)

at java.lang.Thread.run(Unknown Source)

Caused by: java.lang.ClassNotFoundException: com.jackos2500.BlockBreaker.common.BlockBreaker

at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:238)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:56)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Unknown Source)

at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:425)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)

at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)

at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)

at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)

at com.google.common.eventbus.EventBus.post(EventBus.java:267)

at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:165)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)

at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)

at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)

at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)

at com.google.common.eventbus.EventBus.post(EventBus.java:267)

at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:98)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:503)

... 5 more

Caused by: java.lang.NullPointerException

at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:227)

... 32 more

 

 

A detailed walkthrough of the error, its code path and all known details is as follows:

---------------------------------------------------------------------------------------

 

-- System Details --

Details:

Minecraft Version: 1.5.2

Operating System: Windows 7 (x86) version 6.1

Java Version: 1.7.0_21, Oracle Corporation

Java VM Version: Java HotSpot Client VM (mixed mode), Oracle Corporation

Memory: 351895576 bytes (335 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)

JVM Flags: 2 total; -Xms512m -Xmx1024m

AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

Suspicious classes: FML and Forge are installed

IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0

FML: MCP v7.51 FML v5.2.2.684 Minecraft Forge 7.8.0.684 6 mods loaded, 6 mods active

mcp{7.44} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed

FML{5.2.2.684} [Forge Mod Loader] (coremods) Unloaded->Constructed

Forge{7.8.0.684} [Minecraft Forge] (coremods) Unloaded->Constructed

mod_ReiMinimap{v3.3_06 [1.5.2]} [mod_ReiMinimap] (minecraft.jar) Unloaded->Constructed

mod_SpawnerGUI{1.5.2} [mod_SpawnerGUI] (minecraft.jar) Unloaded->Constructed

jackos2500_BlockBreaker{0.3.1} [blockBreaker] (com) Unloaded->Errored

LWJGL: 2.4.2

OpenGL: AMD Radeon HD 7310 Graphics GL version 4.2.12217 Compatibility Profile Context 12.104.0.0, ATI Technologies Inc.

Is Modded: Definitely; Client brand changed to 'fml,forge'

Type: Client (map_client.txt)

Texture Pack: Default

Profiler Position: N/A (disabled)

Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

 

This is your problem jackos2500_BlockBreaker{0.3.1} [blockBreaker] (com) Unloaded->Errored

 

It has a error