Register problem with email

Another problem ... Generally after transfer to new server I have come with some problems , but most were solved ..

Now trying to register a new customer sees the following :

Warning: sha1_file (/ var / www / vhosts / *** / httpdocs / catalog / view / theme / default / template / mail / register.tpl): failed to open stream: No such file or directory in / var / www / vhosts / katoikiashop.gr / httpdocs / vqmod / vqmod.php on line 102Warning: file_get_contents(/var/www/vhosts/***/httpdocs/catalog/view/theme/default/template/mail/register.tpl): failed to open stream: No such file or directory in / var / www / vhosts / *** / httpdocs / vqmod / vqmod.php on line 103Notice: Error: E-Mail message required! in var / www / vhosts / *** / httpdocs / system / library / mail.php on line 71

I do not use the default theme and I do not understand why it refers to this and also the "register.tpl" doesnt exist in this directory .

Any help would be really appreciated!