why running instance cannot get ip address on SYST

my eucalyptus is 2.0.3 and euca2ool is one.three, and OS is centos five,Tiffany Rings, and I decide on Method design set up clc,Tiffany And Co, cc, nc in one machine.
after I managing my instance,Tiffany White, the instance constantly has 0.0.0.0 equally on personal and public ip address. so I can't use SSH login my instance via ip deal with.
and I also config and start my dhcpd server on my device. Make sure you assist me why my operating instance can't get ip deal with,VatorNews - Tagged why underrated but profitable, since it truly brother me for couple of weeks. Any advices or aid will be appreciated,Tiffany Heart Bracelet!
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[root@localhost ~]# services dhcpd status
dhcpd (pid 3679) is operating...
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[root@localhost ]# euca-describe-instances
RESERVATION r-3ECC0773 admin default
INSTANCE i-4AF707DF emi-ABE513F7 0.0.0.0 0.0.0.0 running 0 m1.tiny 2011-06-16T22:26:24.314Z cluster1 eki-143B153C eri-A6601391
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and I recognize my nc.log has this:
[Thu Jun 16 twenty:34:forty 2011][006535][EUCAINFO ] vnetInit(): VNET Configuration: eucahome=/, path=//var/run/eucalyptus/net,Cheap Tiffany Jewelry, dhcpdaemon=,Tiffany Livingston, dhcpuser=, pubInterface=eth0,Tiffany Charm Bracelets, privInterface=eth0,Tiffany Engagement Rings, bridgedev=xenbr0, networkMode=SYSTEM
both public and non-public interface is eth0 that is certainly the cause why I can not have ip tackle?
regards