c# 为什么microsoft Agent只显示文字,但不发音,(已经装了tts5.0)

Question

        private  AxAgent axAgent1 = new AxAgent();
        private  IAgentCtlCharacterEx Character;
        private AgentObjects.IAgentCtlCharacter axAgent1Character = null;
        this.axAgent1.Characters.Load("merlin", (object)"c:\\WINDOWS\\msagent\\chars\\merlin.acs");//导入吉尼这个精灵 
            Character = axAgent1.Characters["merlin"];
            Character.LanguageID = 0x0804;//把语言设置为中语
            axAgent1Character = (AgentObjects.IAgentCtlCharacter)axAgent1.Characters["merlin"];
            Character.Show(null);//显示精灵 
                    Character.Speak("当前您有如下需要处理的信息", null);//让精灵朗读文本 
                    Character.Play("Wave");