How do i Make my Mod compatible to MCForge

[Floppy012]

Hello,

 

I am very new to the Modding area. I wrote a Mod which gives me a cape on a special Server. Now everytime I connect my Minecraft crashes with the following Crash report:

 

---- Minecraft Crash Report ----
// Sorry 

Time: 11.02.13 15:14
Description: Ticking screen

java.lang.AbstractMethodError: eg.getPlayer()Lqx;
at cg.b(TcpConnection.java:466)
at ayh.d(NetClientHandler.java:90)
at ayk.c(GuiConnecting.java:42)
at net.minecraft.client.Minecraft.l(Minecraft.java:1537)
at net.minecraft.client.Minecraft.J(Minecraft.java:846)
at net.minecraft.client.Minecraft.run(Minecraft.java:771)
at java.lang.Thread.run(Unknown Source)


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

-- Head --
Stacktrace:
at cg.b(TcpConnection.java:466)
at ayh.d(NetClientHandler.java:90)
at ayk.c(GuiConnecting.java:42)

-- Affected screen --
Details:
Screen name: aym
Stacktrace:
at net.minecraft.client.Minecraft.l(Minecraft.java:1537)
at net.minecraft.client.Minecraft.J(Minecraft.java:846)
at net.minecraft.client.Minecraft.run(Minecraft.java:771)
at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
Minecraft Version: 1.4.7
Operating System: Windows NT (unknown) (amd64) version 6.2
Java Version: 1.7.0_04, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 565890272 bytes (539 MB) / 648740864 bytes (618 MB) up to 954466304 bytes (910 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 v7.26 FML v4.7.4.520 Minecraft Forge 6.6.0.497 Optifine OptiFine_1.4.6_HD_U_C3 5 mods loaded, 5 mods active
mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
FML [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Forge [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
craftguide [CraftGuide] (CraftGuide-1.6.5.12.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
mod_ZanMinimap [mod_ZanMinimap] (ZansMinimap1.4.7.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
LWJGL: 2.4.2
OpenGL: ATI Mobility Radeon HD 5400 Series GL version 4.2.11931 Compatibility Profile Context, ATI Technologies Inc.
Is Modded: Definitely; Client brand changed to 'forge,fml'
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

 

I did not make any new class. I just edited some classes like:

 

EntityPlayerSP

EntityOtherPlayerMP

GuiingameMenu

GuiConnecting

GuiScreen

NetClientHandler

GuiMainMenu

 

Greetings

 

Floppy

 

[LexManos]

Do not edit base classes, we do not support anyone who edits base classes.

Even for something so retardedly trivial as this, which can be done completely without any base edits at all.