I have installed LD9 sp2 on the core and an updated client on an other server.
In order to set up file replication on the core server i had first to replace lddwnld.dll in the folder C:\Program Files (x86)\LANDesk\LDClient with the newer version of the file. Because I had the error : "This action requires a newer version of lddwnld.dll. Please update the client."
Now the replication process try to start but it is stoped by error code 5. here is a log sample:
Heure actuelle : 2011-03-18 09:18:20 Traitement de '\\coreserver\ldlogon\spyware' vers 'other_server' Connexion à '\\coreserver\ldlogon\spyware' Terminé Connexion à '\\other_server\ldlogon\spyware\' Échec. Erreur : 5 (0x5) Heure actuelle : 2011-03-18 09:18:21
I'm not sure if this is the same problem as you're seeing or not... but I just got the 0x5 error as well. Mine turned out to be invalid write credentials for the preferred server. I back-tracked it by going to the preferred server and looking through the security log. When I saw the failures coming from the account I was using and the 'incorrect username or password' I went back and updated the password in the console and it worked. I must have fat fingered the password or had caps lock on, but this resolved it for me.