[Help] BungeeCord Error

Hello. So i want to create a bungee cord server, i put the bungeecord.jar inside the jars folder (GGServers),and when I start the server, mark me this error in the log

13.02 13:24:03 [Server] INFO Loaded plugin cmd_server version git:cmd_server:1.7-SNAPSHOT:"350cbd7":934 by SpigotMC
13.02 13:24:03 [Server] INFO Loaded plugin cmd_find version git:cmd_find:1.7-SNAPSHOT:"350cbd7":934 by SpigotMC
13.02 13:24:03 [Server] INFO Loaded plugin reconnect_yaml version...

[Help] BungeeCord Error