I'm use an url format that is qemu+tcp://root@192.168.1.8/system or qemu+tcp://192.168.1.8/system

error:unable to connect to libvirtd at '192.168.1.8':errno=10061

error:failed to connect to the hypervisor

I'm use a client libvirt in windows7; The libvirt version is Libvirt-0.8.7-2.exe.The 192.168.1.8 is linux/kvm which is server.