[HELP]mysqladmin flush-hosts??

[ztcjsa]

I set up a source and I put up my reg page. When i go to my reg page it says

"mysql_connect() [function.mysql-connect]: Host 'My-Host' is blocked because of many connection errors. Unblock with 'mysqladmin flush-hosts' in C:\AppServ\www\config.php on line 30."

How do I do this? I am using appserv and Navicat..

Thank you,
ztcjsa