speech animals not run

using UnityEngine;
using System;
using System.Collections.Generic;
using System.Text;
using DotNetSpeech;

public class NewBehaviourScript : MonoBehaviour {
    SpVoice voice = new SpVoiceClass();
    SpeechVoiceSpeakFlags SpFlags = SpeechVoiceSpeakFlags.SVSFlagsAsync;
    public Texture2D[]  m_iMouthBmp; 
    string text="I love unity3d.";
    int i;
    string VisemeId ="viseme";
    public GUISkin myskin ;

    void OnGUI () {
        GUI.skin = myskin;
        GUI.Label(new Rect (20, 20, 120, 50),VisemeId);

        if(GUI.Button (new Rect (20, 60, 120, 50), "speak")) {
            voice.Viseme += new _ISpeechVoiceEvents_VisemeEventHandler(voice_Viseme);
            voice.Speak(text, SpFlags);
            renderer.material.mainTexture = m_iMouthBmp*;*
 *void voice_Viseme(int StreamNumber, object StreamPosition, int Duration, SpeechVisemeType NextVisemeId, SpeechVisemeFeature Feature, SpeechVisemeType CurrentVisemeId) {*
 *VisemeId= CurrentVisemeId.ToString().Replace("SP_VISEME_","");*
 *//VisemeId  = CurrentVisemeId.ToString();*
 *if(VisemeId == "15"|| VisemeId =="17"||VisemeId =="18"||VisemeId =="21") {* 
 *} else {* 
*<p>The script passed,the program not.There is a runtime error:This application has requested the runtime to terminate it in a unusual way.....*

It looks like DotNetSpeech is not compatible with Unity, or maybe you're calling it the wrong way. That's about as much as I can say with the given information.