rhev3.0 ,can not attach a different network to eth0

I had installed rhev3.0 , hypervisor6.2-201110--   , the hypervisor has  2 network  adapters , now I want to create 2 bridge networks  ,one attach to eth0 , another attach to eth1 , bridge   RHEVM  is the hypervisor  management network bridge  that attached to eth0 ,too 

every network has a unique   vlan tag

   I can create  several different networks  in datacenter  , and attach to a cluster in the datacenter ,  then   try to attach  network  to  eth0 ,  only  rhevm  could be used .    

when try to attach  network to eth1 which is not the hypervisor manangment adapter ,  all networks except the rhevm  could be used .

how could I  attach a another network to the  rhev management  adapter  ?