Problem with IONIC CLI

Hi to every one,
i am working on my ionic project and i have encountered a new problem with ionic CLI. when i type ionic lab it gives me this : [WARN] Detected locally installed Ionic CLI, but it’s too old–using global CLI.
once in the lab, i can create new features but no command i write in my .ts file works. i need help please!
Screenshot%20from%202018-04-28%2005%3A49%3A22|690x431