Not really a solution but i passed this and i got an othe problem on the next step.
i downloaded version 0.4.4.23 of NsClient++and i decided to use check_nt have this code:
but in icinga2 i have
and when i use the command in my linux interface it works and shows me the dik space on the host i want.
i think it’s a coding error from me but i can’t find where i’m wrong if i need to put something more or remove something.
Thanks.