On my WHM I create an account, blablabla.com with mailing list support (2)

and then i go to blablabla.com/cpanel and go to mailing list section

I create the list "Testing" and then it's said :

Mailing List Created
The mailing list testing on blablabla.com with password test was successfully created.

But when i go back to mailing list, the list is empty, and the Mailing list never created, I've checked this on ssh, the list is not there or never been created. I'v tried this several times and the result alwas the same

Any1 can help ?
Thanks