HP BIOS/iLO differs from ESXi hardware sensors

On my HP ProLiant DL360 G7 is installed Image Profile : HP-ESXi-5.1.0-standard-iso

There was a memory issue on the machines, which appeared during POST check at the boot cyclus.

Memory module has been replaced by HP, message does not appear anymore.

Also in iLO, there's no hardware problem anymore. IML has been cleared.

Hardware Health Status of ESXi 5.1 still gives a warning message about memory.

I asked HP about it, and they said it's a VMware thing. They won't help.

Do you have any idea ?

Thanks in advance !