emmet dos not work

[thmkhtry]

Hello,
I installing emmet with zip file & add this code:
let g:user_emmet_mode='n' "only enable normal mode functions.
let g:user_emmet_mode='inv' "enable all functions, which is equal to
let g:user_emmet_mode='a' "enable all function in all mode.
& dose not work emmet,help me please.