HPSUM fails with "node inventory failed" error on ML310Gen8 V2 w/Win 2012 Essentials

Hi,

HP Service pack for Proliant installation failed with this error "localhost Node inventory failed" on a new ML310e gen8 v2 running Windows 2012 Essentials (ROK so everything is sourced from HP).

I'm using a freshly downloaded ISO image (SPP2014020) from the SPP web site. 

I tried to enter credentials without success.

I haven't yet activated windows until everything is OK...

Any idea?

BTW: this installation was not done using IP, but directly from the DVD since I was not able to change the system partition size (but this is another problem...)

Thanks for help;

Jeff