CAN ' T PING !!! VCenter

Hi guys,

after install Vcenter package in one of my machines of the ESXi, I can´t launch Vcenter from a remote machine., I investigate and I can´t ping from anymachine  VM to this one( with the VCenter installed), or from a physical machine outside the ESxi this to machine, all are in the same sub-net. BUT the machine that  have the Vcenter, can ping properly to any machine... Also I have restarted the box.

Any idea whats could happens??

I am working with Esxi 5.5

Thanks for any help as allways

Cheers!!

Jesus