TTS using spechlib

Question

I have use this code for TTS...... 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using SpeechLib;

using System.Threading;

public partial class Default2 : System.Web.UI.Page

{

    SpVoice objspeach = new SpVoice();

    protected void Page_Load(object sender, EventArgs e)

    {

        foreach (ISpeechObjectToken Token in objspeach.GetVoices(string.Empty, string.Empty))

        {

         // SpeechLib.ISpeechObjectToken

            //DropDownList1.Items.Add(Token.GetDescription(49));

            DropDownList1.Items.Add(Token.GetDescription());

          

        }

        DropDownList1.SelectedIndex = 1;

    }

    protected void btn1_Click(object sender, EventArgs e)

    {

        objspeach.Voice= objspeach.GetVoices().Item(DropDownList1.SelectedIndex);

        objspeach.Speak(txtspeach.Text.Trim(), SpeechVoiceSpeakFlags.SVSFDefault);

        objspeach.WaitUntilDone(Timeout.Infinite);

    }

}

and its working fine.

problem is-

1. not working in server(IIS)
2. and how to change voice type like male , female as well as adult,teen,child,senior etc.
how do i implement this using speech lib .

Note: I successfull to doing this (point 2) using speech synthesizer. but that also not working in iis.