Can not connect to MYSQL server on Windows Vista 64 bit

[David Parham]

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