Minecraft Forums

I recently just downloaded and installed Modloader. But as I start up minecraft, I got this:

-- BEGIN ERROR REPORT b7f8c5d6 --------
Full report at:
C:\Users\Ashley\AppData\Roaming\.minecraft\crash-reports\crash-2013-06-15_15.59.53-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 6/15/13 3:59 PM

-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_21, Oracle Corporation
Java VM Version: Java HotSpot™ Client VM (mixed mode), Oracle Corporation
Memory: 451152392 bytes (430 MB) / 518979584 bytes (494 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: ModLoader, EntityRendererProxy, BaseMod, ...]
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
ModLoader: Mods loaded: 1
ModLoader 1.5.2


java.lang.NoSuchFieldError: WDIAMOND
at mod_MoreOresMod.<clinit>(mod_MoreOresMod.java:37)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at ModLoader.addMod(ModLoader.java:343)
at ModLoader.readFromModFolder(ModLoader.java:1246)
at ModLoader.init(ModLoader.java:737)
at ModLoader.addAllRenderers(ModLoader.java:205)
at bgy.<init>(RenderManager.java:97)
at bgy.<clinit>(RenderManager.java:14)
at net.minecraft.client.Minecraft.a(SourceFile:261)
at avv.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(SourceFile:507)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 8e5a0100 ----------

EDIT- I Deleted the 1 mod In my mod folder after installing modloader, The crash no longer happened.
But what was the problem?