execv( /usr/local/backup/server/bin/afserver ) failed: Permission denied (errno = 13)

backup先のサーバーで/var/log/messages に延々とでまくり。

May 10 21:41:11 backup xinetd[8914]: execv( /usr/local/backup/server/bin/afserver ) failed: Permission denied (errno = 13)
May 10 21:41:22 backup xinetd[8915]: execv( /usr/local/backup/server/bin/afserver ) failed: Permission denied (errno = 13)

バックアップ元でincr_backupを手動で動かすと

# /usr/local/backup/client/bin/incr_backup
Error: Backup client side subprocess unexpectedly died.

/usr/local/backup/client/var/client.backup.log の内容は下記のとおり

Thu May 10 21:39:54 2007, Starting incremental backup.
Thu May 10 21:41:33 2007, Error: Backup client side subprocess unexpectedly died.
Thu May 10 21:41:33 2007, Incremental backup failed.

意味わからん…