I am recieving the System.InvalidOperationException

I have a voice activated program that is throwing the only error. Its a System.InvalidOperationException I have tried numerous methods and I can not figure out why it is not being corrected.

I am using System.Speech. I have a timer and in the timer, i have it enabled and disabled it from True to False and False to True. Neither of it fixes the issue.

 i have declared my Class

SpeechRecognitionEngine startlistening = new SpeechRecognitionEngine();

I have specified my Events

startlistening.SetInputToDefaultAudioDevice();
startlistening.LoadGrammarAsync(new Grammar(new GrammarBuilder(new Choices("alexis"))));
startlistening.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(startlistening_SpeechRecognized);

and then I have placed the command

case "quit listening":      
Alexis.SpeakAsync("I will await further commands ");
_recognizer.RecognizeAsyncCancel();
startlistening.RecognizeAsync(RecognizeMode.Multiple);
break;

then i have placed my timer

private void tmrSpeech_Tick(object sender, EventArgs e)
    {
        if (recTimeOut == 10)
        {
            _recognizer.RecognizeAsyncCancel();
        }
        else if (recTimeOut == 11)
        {
            startlistening.RecognizeAsync(RecognizeMode.Multiple);
            tmrSpeech.Stop();
            recTimeOut = 0;
        }
        recTimeOut += 1;
    }

I have declared the struct for Start listening

void startlistening_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
    {

        string speech = e.Result.Text;
        switch (speech)
        {
            case "alexis":
                startlistening.RecognizeAsyncCancel();
                Alexis.SpeakAsync("I am back online");
                _recognizer.RecognizeAsync(RecognizeMode.Multiple);
                break;
        }
    }

I am at a loss. I have all references set, as well as the timer set on

Enabled False Interval 10000 GenerateMember True Modifiers Private

Could there be something i am missing. When i tell the program to Quit Listening it uses the AsyncCancel and then if say Alexis then the program responds with no errors. However if i say Quit Listening and wait longer than 10 seconds it will throw the Exception. I have tried everything i know to do. Any Ideas? I am using Visual Studio 2013 Community and its in Winforms and .NET 4.5 Framework