Having problems with the launcher

[kashmir84]

I'm having an error when opening the launcher. I using a mac and whenever I open the launcher and select a version, it sends me to an error report page.

--- BEGIN ERROR REPORT 69a8eb00 --------

Generated 4/29/12 6:55 PM

Minecraft: Minecraft 1.2.5

OS: Mac OS X (x86_64) version 10.7.2

Java: 1.6.0_29, Apple Inc.

VM: Java HotSpot 64-Bit Server VM (mixed mode), Apple Inc.

LWJGL: 2.4.2

OpenGL: NVIDIA GeForce 9400 OpenGL Engine version 2.1 NVIDIA-7.12.9, NVIDIA Corporation

java.lang.NoSuchMethodError: ic2.api.CropCard.registerBaseSeed(Laan;IIIII)Z

at ic2.common.IC2Crops.registerBaseSeeds(IC2Crops.java:82)

at ic2.common.IC2Crops.init(IC2Crops.java:43)

at mod_IC2.load(mod_IC2.java:522)

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(Thread.java:680)

--- END ERROR REPORT babd2f0d ----------

I tried using Java 7 but then it just sends me to a grey screen forever...