[Koha] Migration form Koha 1.2.3. to Koha 2.2.4.

Hello, We are working with Koha 1.2.3., and now we are trying to migrate all the information in that version to a new version in 2.2.4, and the two versions are hold in different servers. We just want to migrate the information from the old database to the new one. Is there someone who has done the same? Is there someone who could help us? Thanks a lot, --- Enric Camón/Alex Araujo