I've transfered an evaluation Joomla website to a different webserver. Both servers are linux servers.

However I canĀ“t edit or remove files around the new server trough FTP connection.

How do i repair it ?

Have you got console access? Maybe chroot helps. You might request your hoster.

I'd pose the question on ServerFault, it's more appropriate with this question.

For those who have console access try

sudo chmod -R 755 <path to your joomla directory>