Access denied, account suspended on Plesk 10 customer that seems to be active

We got an error logging in a Plesk 10 customer saying access denied because the account is suspended. At first sight the account was active, and not suspended. The customer and domains where migrated from another server. Updating a record manually in the psa database resolved the problem.

Access the Plesk database and run this SQL statement;

update smb_users set islocked = 0 where islocked = 1;