Salve, ho scritto un piccolo programma, che leggere e visualizza i dati da un db di mysql di Aruba.

In web.config ho scritto:
<connectionStrings>
<add name="constr" connectionString="server=xxx.xxx.xxx.xxx; port=3306; database=Sqlxxxxxx_3; UId=Sqlxxxxxx; Pwd=xxxxxxxxx;" providerName="MySql.Data.MySqlClient"/>
</connectionStrings>

In un file prova.aspx.vb ho scritto:
Imports MySql.Data.MySqlClient
Partial Class VB
Inherits System.Web.UI.Page
Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
If Not Me.IsPostBack Then
Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
Using con As New MySqlConnection(constr)
Using cmd As New MySqlCommand("SELECT * FROM registraemail")
Using sda As New MySqlDataAdapter()
cmd.Connection = con
sda.SelectCommand = cmd
Using dt As New DataTable()
sda.Fill(dt)
GridView1.DataSource = dt
GridView1.DataBind()
End Using
End Using
End Using
End Using
End If
End Sub

In locale tutto funziona. Quando lo metto online: questo è l'errore:
Authentication with old password no longer supported, use 4.1 style passwords.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code

Exception Details: MySql.Data.MySqlClient.MySqlException: Authentication with old password no longer supported, use 4.1 style passwords.

Dove sta il problema. Mi aiutate a capire.
Grazie