As a reminder, migration is required from the Plesk5 and Plesk6 servers. You must open a support ticket and tell us which server is closest to you so we can get your files migrated before they are all gone.
Also, if you have already requested migration and received the completed message, be sure you have updated the nameservers for your domain. If you have not done so, your domain is not pointing to the correct server and will stop working when the server goes down.