Move WP Customer area to new domain

Hi,

Im trying to move WP customer area to a new domain.

I have move the sql database and all files etc. as usual, but the private files seems not to be linked to its correlating file. When i update a file alle the attachments disappears.
Everything appears to be fine in the frontend beside the file size is missing, and i cant download attachments (File not found or inaccessible at path).

Any clue what im missing, or can you provide at guide/tutorial on how to move WP Customer area to another domain.