I want to use Libvirt to do development on XCP and I write a simple test program of local connection，they are as follows：

conn = virConnectOpenReadOnly("xen:///");
if(conn == NULL) printf("connect\n");

But it has an error：

[root@xenserver-wss monitor_xcl]# ./vm1libvir: Xen Daemon error : unable to connect to 'localhost:8000': Connection refused connect
Then I use the “virsh version”，errors happen again：

[root@xenserver-wss monitor_xcl]# virsh versionerror: unable to connect to 'localhost:8000': Connection refusederror: failed to connect to the hypervisor

Most people suggest to modify the configuration file of“xend”: /etc/xen/xend-config.sxp
but I can’t find this file.
System information:
libvirtd (libvirt) 0.8.2Linux xenserver-wss 2.6.32.12-0.7.1.xs1.4.90.530.170661xen #1 SMP Mon Feb 6 17:55:01 EST 2012 i686 i686 i386 GNU/LinuxXCP-1.0

I would like to know whether Libvirt need Xend to support it and if XCP is no longer supports XM or not? How can I solve this problem?

Thanks in advance.If you require any ore information, please ask.