dhcpd Error

Hello ,
I have installed the proxmox 2 bare-metal iso and moved the ovz virtual machines without any problem

just i see many error messages in " /var/log/messages "

Mar 11 19:25:10 server dhcpd: DHCPDISCOVER from 00:50:56:75:2b:78 via br0: network 0.0.0.0/0: no free leases
Mar 11 19:25:11 server dhcpd: DHCPDISCOVER from 00:50:56:75:97:1c via br0: network 0.0.0.0/0: no free leases
Mar 11 19:25:20 server dhcpd: DHCPDISCOVER from 00:50:56:75:97:1c via br0: network 0.0.0.0/0: no free leases
Mar 11 19:25:21 server dhcpd: DHCPDISCOVER from 00:50:56:75:2b:78 via br0: network 0.0.0.0/0: no free leases
Mar 11 19:25:22 server dhcpd: DHCPDISCOVER from 00:50:56:78:96:12 via br0: network 0.0.0.0/0: no free leases
Mar 11 19:25:31 server dhcpd: DHCPDISCOVER from 00:50:56:75:97:1c via br0: network 0.0.0.0/0: no free leases
Mar 11 19:25:36 server dhcpd: DHCPDISCOVER from 00:50:56:75:2b:78 via br0: network 0.0.0.0/0: no free leases
Mar 11 19:25:37 server dhcpd: DHCPDISCOVER from 00:50:56:78:96:12 via br0: network 0.0.0.0/0: no free leases
Mar 11 19:25:50 server dhcpd: DHCPDISCOVER from 00:50:56:75:97:1c via br0: network 0.0.0.0/0: no free leases
Mar 11 19:25:54 server dhcpd: DHCPDISCOVER from 00:50:56:78:96:12 via br0: network 0.0.0.0/0: no free leases
Mar 11 19:26:05 server dhcpd: DHCPDISCOVER from 00:50:56:75:97:1c via br0: network 0.0.0.0/0: no free leases
Mar 11 19:26:10 server dhcpd: DHCPDISCOVER from 00:50:56:78:96:12 via br0: network 0.0.0.0/0: no free leases
Mar 11 19:26:19 server dhcpd: DHCPDISCOVER from 00:50:56:75:2b:78 via br0: network 0.0.0.0/0: no free leases
Mar 11 19:26:23 server dhcpd: DHCPDISCOVER from 00:50:56:75:97:1c via br0: network 0.0.0.0/0: no free leases
Mar 11 19:26:27 server dhcpd: DHCPDISCOVER from 00:50:56:75:2b:78 via br0: network 0.0.0.0/0: no free leases

........

any one have this problem ?

THank you