这是我的代码：

Dim strMysqLConn As String = "DRIVER={MysqL ODBC 5.1 Driver};Database=database_name;Server=ip_address;UID=username;PWD=password;"
    Dim MysqLConn As New OdbcConnection(strMysqLConn)

    Protected Sub Page_Load(sender As Object,e As System.EventArgs) Handles Me.Load
        If Not Page.IsPostBack Then

            Dim ds As DataSet = New DataSet()
            Dim cmdMysqL As New OdbcDataAdapter("SELECT * FROM categorymaster",MysqLConn)

            MysqLConn.Open()

            cmdMysqL.Fill(ds,"prjs")

            gv.DataSource = ds.Tables("prjs").DefaultView
            gv.DataBind()


            MysqLConn.Close()

        End If
    End Sub

但是,当建立MysqL数据库连接(MysqLConn.Open())时,会返回以下错误：

ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not
found and no default driver specified

为什么这样,我怎么能防止它发生？

此外,看到此错误的可能原因是什么？如果登录凭据不正确,是否会显示此错误？