Network offering issue

[Ahmad Saif]

I want to create a machine with 2 network cards, on network will be 
nated and can be exposed directly to the intenet; and the other one will 
be private only.

By default on advanced networking, when you create a new network it will 
use the network offer "Offering for Isolated networks with Source Nat 
service enabled". I've created another network service named "private" 
with dhcp and firewall only. to use it for the 2nd network interface on 
my vms.

the problem is I can't find my network offer when I create the instance, 
also when I try to change the network offering after creating it form 
the default to "Private" -the network I created- it give me the 
following error :

DEBUG [cloud.network.NetworkManagerImpl] (Job-Executor-89:job-85) 
Network offerings 8 and 7 have different values for specifyVlan, can't 
upgrade
INFO  [cloud.api.ApiDispatcher] (Job-Executor-89:job-85) Can't upgrade 
from network offering 7 to 8; check logs for more information

my case is very simple i need network with public IPs, and another one 
with private ips only (no nating, no public ips)