Domain added. it may take up to 2 hours to start working. Also make sure to set your A and AAAA records to the records shown under the dropdown menu for your domain in Plesk.
Your account is suspended for sending too many emails. if you haven't logged in recently then your account likely has been compromised. a root admin can offer more information on this.
All of these domains load fine for me except "statecollegeguitarlessons.com" which appears to be an expired domain. You can try clearing your browser cache to see if that helps.
The A record for the www part of your domain appears to be missing. since you are using our nameservers, a root admin will need to add the record for you. Escalating....