What procedure did you follow ?
Did you detach from Old config DB and again trying to connect with the same old config after moving to new server farm or you have created a new configuration DB and then after you are not able to access central admin.
There are two ways of miration ,1. SQL server migration and 2. SharePoint server migration.
Could you please brief which procedure you have followed ?
Regards, Pratik Vyas | SharePoint Consultant | http://sharepointpratik.blogspot.com/