Hello Erel,
I do thank your for your reply and after, two days of trial, I am about to give up. Yes, I can generate my own certificate but I am unable to make it work with the one provided.
When I try to put the certificate and the key in PKCS12, I am asked for the 'Export password' but after that, I get a " unable to write random state " error. All is well written but there is something I can't get, reason why I have asked for some help.
Thanks again