When i start minecraft i get this message:
Mods loaded: 14
ModLoader 1.2.5
mod_MinecraftForge 3.0.1.75
mod_ModLoaderMp 1.2.5v1
mod_TooManyItems 1.2.5pre 2012-03-30
mod_BuildCraftCore 3.1.5
mod_BuildCraftBuilders 3.1.5
mod_BuildCraftEnergy 3.1.5
mod_BuildCraftFactory 3.1.5
mod_BuildCraftTransport 3.1.5
mod_BuildCraftSilicon 3.1.5
mod_Forestry 1.4.4.4
mod_BuildCraftZFP (Forestry Package)
mod_IC2 v1.95
mod_PortalGun 1.2.5v1
Minecraft has crashed!
----------------------
Minecraft has stopped running because it encountered a problem.
--- BEGIN ERROR REPORT 8478dc08 --------
Generated 5/16/12 10:54 PM
Minecraft: Minecraft 1.2.5
OS: Windows Vista (x86) version 6.0
Java: 1.6.0_30, Sun Microsystems Inc.
VM: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
LWJGL: 2.4.2
OpenGL: Intel 945G version 1.4.0 - Build 7.14.10.1461, Intel
java.lang.NoClassDefFoundError: forge/AchievementPage
at forestry.config.AchievementManager.initialize(AchievementManager.java:19)
at forestry.config.Config.load(Config.java:179)
at forestry.ForestryCore.load(ForestryCore.java:88)
at forestry.ForestryClient.load(ForestryClient.java:100)
at mod_Forestry.load(mod_Forestry.java:31)
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(Minecraft.java:394)
at net.minecraft.client.Minecraft.run(Minecraft.java:732)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: forge.AchievementPage
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 12 more
--- END ERROR REPORT 4a45afe4 ----------
Can somebody explain me what is the prblem please? 
Thank You 