Aggiungere Guns Per La Gun Mod

[Primitif 1]

ciao a tutti!

ho un piccolissimo problema: ho installato la HEURISTIX'S THEGUNMOD 0.9.99, e fin qui tutto bene; ogni volta però che tento di aggiungere delle armi (che sono dei file .gun2) quando faccio partire minecraft riscontro il seguente errore:

Mods loaded: 7
ModLoader 1.2.5
mod_LittleBlocks 1.13
mod_ModLoaderMp 1.2.5v1
mod_TooManyItems 1.2.5 2012-04-13
mod_SmartMoving 7.6
mod_Guns 0.9.99 for 1.2.5
mod_Zeppelin 1.2.5.0.30



Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem.




--- BEGIN ERROR REPORT 569818c5 --------
Generated 15/07/12 13.24

Minecraft: Minecraft 1.2.5
OS: Windows 7 (x86) version 6.1
Java: 1.7.0_05, Oracle Corporation
VM: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
LWJGL: 2.4.2
OpenGL: GeForce 315M/PCI/SSE2 version 3.3.0, NVIDIA Corporation

java.lang.VerifyError: (class: Item300AAC0, method: <init> signature: (I)V) Call to wrong initialization method
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
at java.lang.Class.getConstructor0(Unknown Source)
at java.lang.Class.getDeclaredConstructor(Unknown Source)
at com.heuristix.AbstractGunBridge.read(AbstractGunBridge.java:76)
at mod_Guns.initItems(mod_Guns.java:175)
at mod_Guns.load(mod_Guns.java:94)
at ModLoader.init(ModLoader.java:891)
at ModLoader.addAllRenderers(ModLoader.java:189)
at ahu.<init>(ahu.java:77)
at ahu.<clinit>(ahu.java:8)
at net.minecraft.client.Minecraft.a(SourceFile:273)
at net.minecraft.client.Minecraft.run(SourceFile:657)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 798e6fa8 ----------


[/CODE]

spero che mi possiate aiutare e grazie in anticipo! :D