引用COM组件报错！未处理异常COMException,求解！

C# code

       //这个是组件类        public SmsClientClass sms = null;        private void Form1_Load(object sender, EventArgs e) {            this.btnLogin.Enabled = false;            this.btnBalance.Enabled = false;            sms = new SmsClientClass();            //这里不会报错            sms.OnConnect += new ISmsClientEvents_OnConnectEventHandler(onConnect);            //这里就会出错（异常来自 HRESULT:0x80040202）            //如果注释了上面的,这句就没错下句就会抱这个错，好像就能用一个事件            sms.OnLoginAccept += new ISmsClientEvents_OnLoginAcceptEventHandler(onLoginResp);            sms.OnUserInfoAck += new ISmsClientEvents_OnUserInfoAckEventHandler(OnUserInfoAck);            sms.OnSmsBatchAck += new ISmsClientEvents_OnSmsBatchAckEventHandler(onSendAck);        }

[解决办法]
那一个一个排查吧,看看是COM的问题还是C#的问题
VC能调用这个COM吗
[解决办法]
还在发送垃圾短信呀