大家帮助看一下，哪里错了

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim olecon As New OleDbConnection("provider=microsoft.jet.oledb.4.0;data source=d:\info.mdb;jet oledb:database password=123")
        Dim olestr As String = "select 密码 from info"
        Dim olecmd As New OleDbCommand(olestr, olecon)
        Dim olereader As OleDbDataReader
        olecon.Open()
        olereader = olecmd.ExecuteReader
        olereader.Read()
        If TextBox1.Text = olereader.GetString(0).Trim Then
            If TextBox2.Text = TextBox3.Text Then
                olereader.Close()
                = CommandType.Text
                = "update info set 密码=" & TextBox2.Text.Trim
                olecmd.ExecuteNonQuery()
            Else
                MsgBox("两次密码输入不一致!")
            End If
        Else
            MsgBox("原密码不正确!")
        End If
        olecon.Close()
    End Sub

运行后，提示至少有一个参数没有被指定值  好像是
= "update info set 密码=" & TextBox2.Text.Trim
没有给值，还是我写法错误呀