Wolfe_155

I can play single player but cant join my friends server. Everyone else can join but i cant. When i try and join the server it says: Forge mod loader could not connect to this server The mods and versions listed below could not be found They are required to play on this server Most of the things say MineFactoryReloaded: and the others are saintspack, advancedgenetics, dragonmounts, morph, witchery. Could somebody help me please?