Petit soucie de serveur modée 1.8

Bonjour,je un serveur modée 1.8 mais le soucie c'est quand j'ouvre le serveur sa me met plein message d'erreur .




C:\Users\packard bell\Desktop\Serveur Minecraft>color A

C:\Users\packard bell\Desktop\Serveur Minecraft>"C:\Program Files\Java\jre7\bin\
java.exe" -Xmx512M -Xms512M -jar forge-1.8-11.14.0.1295-1.8-universal.jar
We appear to be missing one or more essential library files.
You will need to add them to your server before FML and Forge will run successfu
lly.java.lang.ClassNotFoundException: net.minecraft.launchwrapper.Launch
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 java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunc
hWrapper.java:25)
at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaun
chWrapper.java:12)

C:\Users\packard bell\Desktop\Serveur Minecraft>pause
Appuyez sur une touche pour continuer...