Does your Core Server have a LANDesk Management Agent service?
If not, find cba8inst.msi in ldlogon and run it.
That was it, i don't know why LANDesk Management Agent didn't install itself ...
The OSD Process begin automatically... but a new probleme at the first step, see you on another post
It is usually because an agent was installed at one point on the Core Server. Every now and then on an upgrade that service is missing if the agent was installed.