[Koha] data migration from one KOHA installation to another

Dear All, I have an installed version of KOHA(3.00.04) and a well populated database of this system. Now I have installed KOHA(3.00.06) on another sytem due to some official reason. I am stuck at data migration from one system to another. kindly help me, how to migrate my data from one system to another. Thanking you in advance. Regards Rekha saraswat Sr. Lecturer(MCA) CDAC, Noida