When I try to add folder user I get an error:

modifyObject: Object class violation
distinguished name: cn=andrejz,ou=lj,o=arne
objectClass: iFolderUser
attribute: iFolderServerName

I know I don't have iFolderUser class in NDS schema, and unfortunally I can
not add it. When I try to add it, I get error: file open failed: ice.log
I can open a file with notepad.