Well ladies and gentlemen,
next try from a desperate man :
Still no way for ftp downloads.
SME 5.1.2 with update_2, public server and gateway, static ip, leased line.
Clients I've tried : konqueror, Navigator, IE 6.0, cuteftp, wsftp_pro, commandline ftp on linux and win xp.
In case a download starts, it always stucks at 33 - 36 percent with resume not working at all ( + 0% ).
As loosing more and more hair any hint would be very appriciated ( even if it was a "rtfm" telling me which ).
Thanks,
Ralph