Crash minecraft

Bonjour

Après installation de nombreux mods, je reçoit le message :

Mods loaded: 5
ModLoader Beta 1.7.3
mod_TooManyItems 1.7.2 2011-07-01
mod_monmod 1.6.6
mod_mymobs 1.5
mod_mymod 1.6.5

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

Minecraft has stopped running because it encountered a problem.

If you wish to report this, please copy this entire text and email it to support@mojang.com.
Please include a description of what you did when the error occured.



--- BEGIN ERROR REPORT bd76b10a --------
Generated 24/07/11 15:08

Minecraft: Minecraft Beta 1.7.3
OS: Windows 7 (x86) version 6.1
Java: 1.6.0_26, Sun Microsystems Inc.
VM: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
LWJGL: 2.4.2
OpenGL: GeForce G 105M/PCI/SSE2 version 3.3.0, NVIDIA Corporation

java.lang.NoSuchMethodError: px.updateWorldLightLevels()V
at kv.updateWorldLightLevels(GameSettings.java:162)
at kv.a(GameSettings.java:861)
at ModLoader.init(ModLoader.java:825)
at ModLoader.AddAllRenderers(ModLoader.java:183)
at th.<init>(th.java:60)
at th.<clinit>(th.java:9)
at net.minecraft.client.Minecraft.a(Minecraft.java:138)
at net.minecraft.client.Minecraft.run(Minecraft.java:437)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 39d72374 ----------

Que doit-je faire ? Merci d'avance