https and domino 5.0.9 linux

hi,

i have to configure the https on a linux-domino-server (SuSE 7.3 - domino 
5.0.9 german).
the *.kyr and *.sth files are copied to the server. but if i try to 
establish a https-connection - it fails
(persönliche Schlüsselring nicht gefunden - privat keyring not found) 
the path in the virt. serverdocument is correct 
(/opt/lotus/https/ssh_key.kyr)
the rights for the kyr and the sth files are: - r w - r - - - - -   root  
notes
(i've also tried - r w x r w x - - -   root     notes  -> no effect)

what's wrong ??? 

if i use the both files on a windows-domino - it works fine :-(

Mit freundlichen Grüßen
Steffen Renker