How to change IP address and hostname of PVE machine after installation ?

Good day to everyone !

I've installed Proxmox VE 3.1 in my LAN. Server has 4 NICs (eth0,1,2,3). During installation I've used temporary IP addresses (192.168.100.221) for the first NIC and temporary hostname proxmox1. Now I want to change IP address and hostname to transfer server to other LAN.

But after changing IP address (new address 192.168.0.1) in /etc/network/interfaces and hostname (new hostname srv01) in /etc/hostname and correcting /etc/hosts, web-interface didn't answer.

Is any correct way to change IP and hostname on installed standalone PVE ?

Thanks in advance for answer ).