[Satellite6] Provisioning RHEL5 using PXE-less Discovery failed to kickstart after discovery, stopped in pending kexec installation

Issue

• I am able to manage PXEless discovery /provisioning for RHEL 6 and RHEL 7. But for some reason, I couldn't do this for RHEL 5. Does satellite support PXEless discovery /provisioning for RHEL 5?
• RHEL5 server, boots off the iso and I find it under discoverd hosts, but never seems to get the kexec or doesn't know what to do when it does the screen just stays on the waiting for the Satellite server.