Active directory Migration from windows server 2003 to windows server 2012 with DHCP Role

We are Migrating Current Active directory 2003 to windows server 2012 with DHCP role.

We have windows server 2012 core on which hyper v is configured and in hyper v we have installed windows server 2012 for the migration of active directory from windows server 2003.

We have successfully migrated AD and DNS role and transferred all FSMO roles to new Windows server 2012 server.

But we have issue with DHCP.

We have Export DHCP  settings from windows server 2003 and than import in windows server 2012 server. we have followed below steps for this.

on 2003 Domain controller
open cmd as a Administrator and run netsh dhcp server export c:\dhcp.txt all
copy dhcp.txt file to new domain controller windows server 2012
on 2012 Domain controller
open cmd as a Administrator and run netsh dhcp server import c:\dhcp.txt all

Authorized dhcp server on windows server 2012 and disable DHCP role in 2003 domain controller and trying to get lease from 2012 domain controller.

Lease can not be getting form new 2012 domain controller. The IP is getting on a client machine is 169.252.x.x

 we have restarted service twice and checked event log and got below details

"The DHCP\BINL service on the local machine belonging to the windows administrative domain has determine that authorized to start. it is servicing clients now."

Is there any configuration is missing in a hyper v or in dhcp ??

Kindly suggest....

Quick response highly appreciable....
Who is Participating?
Sarang TinguriaConnect With a Mentor Sr EngineerCommented:
Just export DHCP from 2012 (New) server and import once again in same using the same procedure you have done above..I also had been in same error once doing this it got working
Stelian StanConnect With a Mentor Network AdministratorCommented:
Delete the scope on 2012 DHCP server then open the "dhcp.txt" file and change the IP Address of 2003 DHCP server with 2012 DHCP server. Import the file again on 2012 DHCP server.
Have you modified IP helper information in your network device (Router/Switch) to 2012 IP.

IP helper is configured to find the DHCP server in the network.
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