Change Hostname of esx 3.5 Host

Hi,

is there a working and neat way to rename a esx 3.5 host?

As read in another thread esxcfg-advcfg should do that (esx-cfg -s NewName.dnszone /Misc/Hostname) but that does not work (even there is no errormessage).

root@oldname root# esxcfg-advcfg -s NewName.bla /Misc/HostName

Value of HostName is NewName.bla

root@oldname root# esxcfg-advcfg -g /Misc/HostName

Value of HostName is NewName.bla

root@oldname root# shutdown -r now

....after reboot:

root@oldname root# hostname

oldname.bla

Can someone help me?

Chris