2-Node-HA Cluster| Fencing Issue

[MSAdmin]

Hello Community,

we got new Servers some days ago and at the moment i try the build a 2-node-ha cluster following the wiki.
The Cluster is working, i configured drbd storage, that finished syncing yesterday, but the fencing keeps failing. I use Proxmox 3.0 (yesterday updated).

I got 2 identical hardwares here: 2 times supermicro server with X9 Mainboard Series with IPMI (which i try to use for fencing).

The Servers got 2 NIC: eth0 is configured in a subnet with our firewall and internet gateway (192.168.100.x) , eth1 for drbd and fencing (i configured the BMC through BIOS in a 10.0.7.x subnet and the eth1 by proxmox in the same subnet, might that be the mistake ?). As far as i understood, the BMC is in a vlan with eth1 by the server manufacturer. As far as i could see, there is also an dedicated network port for ipmi / bmc.

<?xml version="1.0"?>
<cluster config_version="5" name="InnoHA">
  <cman expected_votes="1" keyfile="/var/lib/pve-cluster/corosync.authkey" two_node="1"/>
  <clusternodes>
    <clusternode name="Proxmox1" nodeid="1" votes="1">
      <fence>
        <method name="reboot">
          <device action="reboot" name="fenceProx1"/>
        </method>
      </fence>
    </clusternode>
    <clusternode name="Proxmox2" nodeid="2" votes="1">
      <fence>
        <method name="reboot">
          <device action="reboot" name="fenceProx2"/>
        </method>
      </fence>
    </clusternode>
  </clusternodes>
  <fencedevices>
    <fencedevice agent="fence_ipmilan" lanplus="1" ipaddr="10.0.7.220" login="XXX" name="fenceProx1" passwd="XXX" power_wait="5"/>
    <fencedevice agent="fence_ipmilan" lanplus="1" ipaddr="10.0.7.221" login="XXX" name="fenceProx2" passwd="XXX" power_wait="5"/>
  </fencedevices>
  <rm>
    <pvevm autostart="1" vmid="101"/>
  </rm>
</cluster>

So basically my question is how to configure the NIC and the fencing agents to get the HA to work ?