HP SIM 7.4 and many Blades with SerialNumber as Preferred System Name

Hello,

we have a fresh 7.4 installation and I wonder why half of our Blades are not discovered with the right hostname.
All of them are ESXi Installations.
All iLOs are disovered with the correct names.

I can't find a difference in configuration...they're exactly the same.

Does anybody have the same Problem?

Another question I have: Do I have to use "mxnode -mf bla.xml" on the SIM Server itself or can I copy the binary on the Server I want to put in Maintenance Mode and start the script/command there?

Thanks in advance

Giuseppe