Problem Server crashing; Exception in tick loop

[ArestheBloodGod]

I am trying to update my server to 1.5.1 for me and a couple friends and I keep getting this error:


---- Minecraft Crash Report ----
// Don't do that.

Time: 5/2/13 7:55 PM
Description: Exception in server tick loop

cpw.mods.fml.common.LoaderExce ption: java.lang.ClassNotFoundExcepti on: dark/library//CommonProxy
at cpw.mods.fml.common.ProxyInjec tor.inject(ProxyInjector.java: 67)
at cpw.mods.fml.common.FMLModCont ainer.constructMod(FMLModContainer.java:471)
at sun.reflect.NativeMethodAccess orImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccess orImpl.invoke(NativeMethodAcce ssorImpl.java:57)
at sun.reflect.DelegatingMethodAc cessorImpl.invoke(DelegatingMe thodAccessorImpl.java:43)
at java.lang.reflect.Method.invok e(Method.java:601)
at com.google.common.eventbus.Eve ntHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.Syn chronizedEventHandler.handleEvent(SynchronizedEventHandler.j ava:45)
at com.google.common.eventbus.Eve ntBus.dispatch(EventBus.java:3 14)
at com.google.common.eventbus.Eve ntBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.Eve ntBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadContro ller.propogateStateMessage(Loa dController.java:165)
at sun.reflect.NativeMethodAccess orImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccess orImpl.invoke(NativeMethodAcce ssorImpl.java:57)
at sun.reflect.DelegatingMethodAc cessorImpl.invoke(DelegatingMe thodAccessorImpl.java:43)
at java.lang.reflect.Method.invok e(Method.java:601)
at com.google.common.eventbus.Eve ntHandler.handleEvent(EventHan dler.java:74)
at com.google.common.eventbus.Syn chronizedEventHandler.handleEv ent(SynchronizedEventHandler.j ava:45)
at com.google.common.eventbus.Eve ntBus.dispatch(EventBus.java:3 14)
at com.google.common.eventbus.Eve ntBus.dispatchQueuedEvents(Eve ntBus.java:296)
at com.google.common.eventbus.Eve ntBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadContro ller.distributeStateMessage(Lo adController.java:98)
at cpw.mods.fml.common.Loader.loa dMods(Loader.java:503)
at cpw.mods.fml.server.FMLServerH andler.beginServerLoading(FMLS erverHandler.java:85)
at cpw.mods.fml.common.FMLCommonH andler.onServerStart(FMLCommon Handler.java:350)
at net.minecraft.server.dedicated .DedicatedServer.func_71197_b( DedicatedServer.java:94)
at net.minecraft.server.Minecraft Server.run(MinecraftServer.jav a:644)
at net.minecraft.server.ThreadMin ecraftServer.run(SourceFile:57 3)
Caused by: java.lang.ClassNotFoundExcepti on: dark/library//CommonProxy
at java.lang.Class.forName0(Nativ e Method)
at java.lang.Class.forName(Class. java:264)
at cpw.mods.fml.common.ProxyInjec tor.inject(ProxyInjector.java: 50)
... 27 more

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

-- System Details --
Details:
Minecraft Version: 1.5.1
Operating System: Linux (amd64) version 2.6.32-042stab072.10
Java Version: 1.7.0_10, Oracle Corporation
Java VM Version: Java HotSpot™ 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 118626304 bytes (113 MB) / 469762048 bytes (448 MB) up to 1585446912 bytes (1512 MB)
JVM Flags: 26 total; -XX:+UseG1GC -XX:ThreadPriorityPolicy=42 -XX:CompileThreshold=1500 -XX:-UseGCOverheadLimit -XX:+TieredCompilation -XXarallelGCThreads=1 -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=15 -XX:+UnlockExperimentalVMOption s -XX:+UseAdaptiveGCBoundary -XXermSize=64M -XX:MaxPermSize=256M -XX:+UseGCOverheadLimit -XX:+UseBiasedLocking -Xnoclassgc -Xverify:none -XX:UseSSE=3 -XX:+UseThreadPriorities -XX:+UseLargePages -XX:+UseStringCache -XX:+OptimizeStringConcat -XX:+UseFastAccessorMethods -Xrs -XX:+UseCompressedOops -XX:+AggressiveOpts -Xmx1512M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
CraftBukkit Information:
Running:
Failed to handle CraftCrashReport:
java.lang.NullPointerException
at org.bukkit.Bukkit.getName(Bukk it.java:69)
at org.bukkit.craftbukkit.v1_5_R2 .CraftCrashReport.call(CraftCr ashReport.java:19)
at net.minecraft.crash.CrashRepor tCategory.func_71500_a(CrashRe portCategory.java:106)
at net.minecraft.crash.CrashRepor t.func_71504_g(CrashReport.jav a:59)
at net.minecraft.crash.CrashRepor t.<init>(CrashReport.java:41)
at net.minecraft.server.Minecraft Server.run(MinecraftServer.jav a:701)
at net.minecraft.server.ThreadMin ecraftServer.run(SourceFile:57 3)

FML: MCP v7.44 FML v5.1.43.679 Minecraft Forge 7.7.2.679 93 mods loaded, 93 mods active
[MODS LOAD HERE FINE]
Profiler Position: N/A (disabled)
Is Modded: Definitely; Server brand changed to 'mcpc,craftbukkit,fml,forge'
Type: Dedicated Server (map_server.txt)

EDIT: I solved this problem by reinstalling forge on a vanilla server. I am getting a new error though:

cpw.mods.fml.common.MissingModsException
at cpw.mods.fml.common.Loader.sortModList(Loader.java:247)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:484)
at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:85)
at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:352)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:69)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:429)
at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)