helpppppp

i played to day in a server and in this server there was alot of cool effects like trail aura and when someone crash there is like a wave of energy and when u jump and i opening my own server there is none of this why??? how can i hae those effects?? if i have the effects on the server...

ok my friend gets this error on his OS Fatal Error Net Send packet ERROR: WSARNIVAL any one knoe whats wrong this happends when he trys to vonnect to an ESF server thanks a lot