I don't understand. Which error have you encountered? Where is the full error message? Why aren't you using TTS directly?
		
		
	 
I use TTS directly, and needed some implements only. like this...
Sub ts_Ready(Success As Boolean)
    If Success Then
        'enable all views
        For i = 0 To Activity.NumberOfViews - 1
            Activity.GetView(i).Enabled = True
        Next
        ts.SetLanguage("ko","kr")
        wait for (TTSFunctions.GetListOfAvailableLanguages("")) Complete(sAvail As String)
        LogColor(sAvail, Colors.Blue)
        LogColor(TTSFunctions.GetTTSCurrentLocale(ts), Colors.Green)
  
        Dim l As List,m As Map,id As Long
        l.Initialize
        m.Initialize
        l=TTSFunctions.GetTTSNamesAndPackages(ts)
        Dim ttsP(l.Size) As String
        spnEngine.Clear
        For ii = 0 To l.Size - 1
            m = l.Get(ii)
            LogColor(m,Colors.Magenta)
            ttsP(ii)=m.Get("TTSPackage")
            spnEngine.Add(m.Get("TTSName"))
            If m.Get("IsDefaultTTS") Then id=ii
        Next
        ttsPackage=ttsP
        spnEngine.SelectedIndex = id
        spnrLanguages_ItemClick(spnrLanguages.SelectedIndex,"ko")
    Else
        Msgbox("Error initializing TTS engine.", "")
    End If
End Sub
Sub Activity_Resume
    If ts.IsInitialized = False Then
        ts.Initialize("ts")  
    End If
End Sub
Sub Activity_Pause (UserClosed As Boolean)
    ts.Release
End Sub
Sub btnSpeak_Click
    Dim isSpeak As Boolean
    isSpeak=TTSFunctions.IsTTSSpeaking(ts)
    Sleep(100)
    If btnSpeak.Tag=1 Then
        ts.Speak(".", True)
        Sleep(100)
        ts.Stop
        btnSpeak.Tag=Null
        btnSpeak.Text="Speak"
        If isSpeak Then Return
'        Return
    End If
    If EditText1.Text.Length > 0 Then
        ts.Speak(EditText1.Text, True)
        btnSpeak.Tag=1
        btnSpeak.Text="Stop"
    End If
End Sub
Sub barSpeechRate_ValueChanged (Value As Int, UserChanged As Boolean)
    If UserChanged Then
        ts.SpeechRate = Value / 10
        lblSpeed.Text="Speed " & (Value / 10)
    End If
End Sub
Sub barPitch_ValueChanged (Value As Int, UserChanged As Boolean)
    If UserChanged Then
        ts.Pitch = Value / 10
        lblPitch.Text= "Pitch " & (Value / 10)
    End If
End Sub