Yes, I am using Citrx Xen 5.5 with the V5 and in the new scenario 5.6 with the v6.
But with the old v5 I am not using failover, so export/import settings is obviated.

The pdf "How to setup iSCSI Failover with XenServer" helps me to configure the xen, but unfortunately I don't get to that point. So, how far does the Xen has to be configured, when I am trying to start the failover service? Does he play any role at this point? Configuring the Xen in the mentioned way let the dss service still tell me "Configuration of both nodes finished with errors".

Thanks again.