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I am trying to get SPC for my minecraft because i love to build and want to have world edit to help. I did exactly what it said on the mod page to install it for 1.6.2 and i opened my minecraft with the modded version and got this crash report:
---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 4/10/14 3:57 PM
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: com/sijobe/spc/core/HookManager
at SPCServerPlayerBase.<clinit>(SPCServerPlayerBase.java:21)
at ju.<init>(EntityPlayerMP.java:92)
at hm.a(SourceFile:274)
at bkz.b(SourceFile:67)
at net.minecraft.server.MinecraftServer.t(SourceFile:488)
at net.minecraft.server.MinecraftServer.s(SourceFile:405)
at bkw.s(SourceFile:124)
at net.minecraft.server.MinecraftServer.run(SourceFile:339)
at hh.run(SourceFile:582)
Caused by: java.lang.ClassNotFoundException: com.sijobe.spc.core.HookManager
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 9 more


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.6.2
Operating System: Windows Vista (x86) version 6.0
Java Version: 1.7.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 89576256 bytes (85 MB) / 203173888 bytes (193 MB) up to 518979584 bytes (494 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
AABB Pool Size: 2424 (135744 bytes; 0 MB) allocated, 2342 (131152 bytes; 0 MB) used
Suspicious classes: ServerPlayerBase, SPCServerPlayerBase]
IntCache: cache: 2, tcache: 0, allocated: 1, tallocated: 63
Profiler Position: N/A (disabled)
Vec3 Pool Size: 307 (17192 bytes; 0 MB) allocated, 307 (17192 bytes; 0 MB) used
Player Count: 0 / 8; []
Type: Integrated Server (map_client.txt)
Is Modded: Very likely; Jar signature invalidated


Can you guys help me, what went wrong and how can i fix it?