Unable to add host to Vcenter

I am trying to add host on my Vcenter with it gives me error

"Add host (name) Cannot contact the specified host (10.32.xx.xx). The host may not be available on the network, a network configuration problem may exist, or the management services

on this host may not be responding."

I am not a Vm expert , can anybody help. Also I can ping the ESXi host and also login to ESXi directly from the Vspeher client.

Pls help.