the dhcp/binl service on this workgroup server has encountered another server with ip address..

Windows Server 2008 R2 DHCP Standalone Server, configured for wireless clients in remote VLAN (different VLAN). When a new scope configured for DHCP VLAN (VLAN which DHCP server’s IP is)  in domain authorized DHCP server, standalone DHCP server detects this and stops working.

To get standalone DHCP server work, add this key in its registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\DHCPServer\Parameters
Name: DisableRogueDetection
Type: REG_DWORD
Data: 0x1