Proxmox 4.3 ubuntu 14.04 network not works

[maykel535]

Hi, I have install proxmox 4.3 with LXC VM ubuntu 14.04 template. All ok, but I restart the vm ubuntu and the network not working...

Attach this screenshot:

http://imgur.com/a/bVrT9

I have more VMs with LXC and not problem network with these... I try change the ip address but not work.

Why?