libvirt can not start vm

[bigclouds]

hi,all
if i disable selinux at the moment, does this error matter?
 
type=VIRT_CONTROL msg=audit(1379823101.861:1278): user pid=3007 uid=0 auid=0 ses=15
msg='virt=kvm op=start reason=booted vm="testname-1"
uuid=24f7e975-9aa5-4a14-b0f0-590add14c8b5 vm-pid=-1 exe="/usr/sbin/libvirtd"
hostname=? addr=? terminal=? res=failed'
 
libvirtd can not start vm, but i can start throught command line which is getten from
libvirtd.log.