How to: Clone server proxmox 3

I had a case like this:
SERVER 1
I have a server that I have installed proxmox 3. with 4 KVM with 2 card networks they are.


SERVER 2
Empty CPU not installed


TERMS
SERVER 1 and Server 2 has the same hardware specs.


QUESTION
How do I make the clone server 1 to server 2?


I have tried:
I did clone with Clonezilla, with the result the server can boot and lit, but could not detect the presence of the card networks they are, but when I "ifup eth0" is not an error. and when I typed "ifconfig eth0" writing error messages.


Anyone know the solution?
Thank you ....