Can not connect to MYSQL server on Windows Vista 64 bit

I have a vb.net app that was running fine on two XP computers using
Mysql 5.0 server. I switched to a new Vista 64 bit computer, and now
it gives me a message that it can not connect to any mysql hosts. In
Navicat, when I try to setup the connection, it gives message "2003 -
Can't connect to mysql server on Dell1440 (10060)

I have added port 3306 to the windows firewall, and after it didn't
work, totally turned off the firewall. Now if I bring up the app, and
go into a one record at a time update form, the first record will
appear, but it won't page to the next one without the failure on the
connection.

Any ideas as to what I need to do to make it work properly.

Thanks,

David


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