Losing Admin, when i disconnect

Hi everyone,

First of all, i tried to seek an answer but since i'm not english, it's hard to search with efficient words :(

My problem is:
I have a teamspeak, and everytime I quit TS, when I restart and connect to my TS, I lose the administrator.
I gave key to my friends in case my pc was the problem and it does it for them aswell.

I can give you any informations needed to help to resolve my problem

Thanks for your future answer :)

Losing Admin, when i disconnect