Minecraft Forge Server Crash with Custom Modpack

I tried to play a Custom Modpack with a friend but the console says everytime :

Caused by: java.lang.ClassNotFoundException: org.lwjgl.LWJGLException

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)

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:102)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

... 9 more

Crash Report:

---- Minecraft Crash Report ----

// Why did you do that?

Time: 1/29/17 7:22 PM

Description: Exception in server tick loop

java.lang.NoClassDefFoundError: org/lwjgl/LWJGLException

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Unknown Source)

at cpw.mods.fml.common.Loader.identifyMods(Loader.java:330)

at cpw.mods.fml.common.Loader.loadMods(Loader.java:484)

at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:99)

at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:350)

at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:69)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:445)

at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)

Caused by: java.lang.ClassNotFoundException: org.lwjgl.LWJGLException

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)

at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:102)

at java.lang.ClassLoader.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: 1.6.4

Operating System: Linux (amd64) version 4.4.26-nitradoV3-MC-1000-nH-dP-d-a

Java Version: 1.7.0_71, Oracle Corporation

Java VM Version: Java HotSpot 64-Bit Server VM (mixed mode), Oracle Corporation

Memory: 205435504 bytes (195 MB) / 259522560 bytes (247 MB) up to 2075918336 bytes (1979 MB)

JVM Flags: 7 total; -Xms256M -Xincgc -XX:+DisableExplicitGC -XX:-UseGCOverheadLimit -XX:SoftRefLRUPolicyMSPerMB=1000 -XX:MaxPermSize=384M -Xmx2048M

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

FML: MCP v8.11 FML v6.4.49.965 Minecraft Forge 9.11.1.965 6 mods loaded, 0 mods active

mcp{8.09} [Minecraft Coder Pack] (minecraft.jar)

FML{6.4.49.965} [Forge Mod Loader] (minecraft_server.jar)

Forge{9.11.1.965} [Minecraft Forge] (minecraft_server.jar)

CodeChickenCore{0.9.0.9} [CodeChicken Core] (minecraft.jar)

denLib{3.2.6} [denLib] (minecraft.jar)

ImmibisMicroblocks{57.6.4} [immibis's Microblocks] (ImmibisMicroblocks 57.6.4.jar)

Profiler Position: N/A (disabled)

Is Modded: Definitely; Server brand changed to 'fml,forge'

Type: Dedicated Server (map_server.txt)