Hello,
Please read this FAQ: http://webyog.com/faq/content/23/15/en/error-no-2003-can_t-connect.html
This is a connection error and not an authentication error (ie. not password etc. problem). First of all check for firewall setings on the server and the client machine.
I suggest you read the help file (help..help menu) ..'getting started' paragraph.
Regards,
Sathish