yes, it happened exactly as I say... I contacted iriver customer support and they said than as iriver story hd wi-fi is not sold in Europe, I cannot accept an automatic update... But late, I accepted to download it and I think that by mistake my iriver tried to install the iriver basic firmware version, instead of the wifi version one... And now my reader is frozen and as I am in Europe I don't know how to sent the reader to repair center... It's very bad...
Thank you for answering me