When you upgrade, do you keep the same config.php? If so then the settings are probably still correct. You could make sure you have
Code:
$config['MasterServer']['usepconnect'] = 0;
but other than that I don't know what you could do other than to get your host to help you figure it out (the error message actually contains the command to run to clear the error, so I don't know why they say they don't know how to do it).
BTW, I'm not an expert on mysql admin, I'm just reading the error message, and I googled the error message to see what other people did about it.