I need some advise regarding iPrint issue I have, pls?

Server: SLES10SP3 + OES2 SP2 (32bit)

I have a problem when modifying and creating Driver Profile from iManager on IE7 and IE8.
I was working fine about a month ago but its getting funny suddenly even though no updates have applied on the server.
Moreover, I restarted services by;
rcnovell-idsd restart and rcnovell-ipsmd
but no luck.
Moreover, server reboot does not help.

I found errors on iPrint server.
* Confidential info has modified in the log

Jun 29 09:25:26 Print1 idsd[26857]: directoryLogin(): Unable to bind to directory server "serverName.domain.name" as object CN=DriverStore,OU=ABC,O=123 (Error=FFFFFDA7)
Jun 29 09:25:26 "Server Name" idsd[26857]: directoryLogin(): Unable to bind to directory server 127.0.0.1 as object CN=DriverStore,OU=ABC,O=123 (Error=FFFFFDA7)
Jun 29 09:25:26 Print1 idsd[26857]: Failed to set idsd configuration information in directory object(s) specified in configuration file (Error=1). Retry in 5 seconds...


The objectis located in right place.
eDirectory sync has no problem at all.
Time sync has no problem at all.
So, no eDirectory errors at all.
Other operations on iManager works fine.