Issue on Reload of the script, failed to connect database--"null password given; logon denied"
As I can see in your connection, you have not mention the USerid and password.
(If your using ODBC connection)
When you click on the Connect Button a small pop up with user id comes up. Select the DSN connection you have created and enter the userid and password. if it is authenticated, it will provide u a connection string with userid and password.
One more reason for the error might be :
Since you are not entering userid and password in your above connection string ,the table which you are trying to pull might have access restriction like anynomus cannot access the data.