If you have multiple hosting accounts on the same server, then the siteadmin login details will be the same for all those accounts. The details will be those of the first account you had on that server.
To make any changes to the account, you must use the main username and password, rather than an email address to login.
Please also note that if you are behind a firewall or proxy, you must ensure that ssl traffic on port 8443 is allowed.
To access siteadmin you need to visit: yourdomainname.ext/siteadmin
(Please replace .ext with .com /.co.uk /.net etc)
For example:
example.com/siteadmin
You will be redirected to a page with a 34SP.com logo (top left). This is a secure page that you should enter your username and password into. You will then be able to log into your control panel.
On Plesk 7 servers, once logged in you must select which domain you wish to administer from the list.
On Plesk 8 servers, once logged in you must click Home then you can select which domain you wish to administer from the list.
Note:
You should always use the logout button in the left of your control panel screen when you are finished using your control panel. If you simply close your browser the system does not know you have left and will not allow you to log in for up to 15 minutes.