Why the application can't receive the kTelTelephonyNotification after calling SysNotifyRegister?

[henryxu(徐�S�A=研�l)]

My application need to do something when receives a call.

So I add the following codes in the PilotMain:

    case sysAppLaunchCmdSyncNotify:
    case sysAppLaunchCmdSystemReset:
        error = SysCurAppDatabase(&cardNo, &appID);
        if (error) 
            return error;
        SysNotifyRegister(cardNo, appID, kTelTelephonyNotification,
            NULL, sysNotifyNormalPriority, NULL);
        break; 

    //Once registered, we receive incoming SMS message
    //notifications as a sysAppLaunchCmdNotify launch code    
    case sysAppLaunchCmdNotify:
        if (((SysNotifyParamType*)cmdPBP)->notifyType ==       
sysNotifyCardRemovedEvent)
        {       
            ErrMessage(d_lang_ui_ExpansionCardRemoved);      
        }

        else if (((SysNotifyParamType*)cmdPBP)->notifyType == 
kTelTelephonyNotification)
        {
            //MyPrintF("\nphone call\n");
            //ErrMessage("phone call");
             EditRecord(g_playlistsStoredDatabase,  0,  "New");
        }

        break;
  
I can receive the sysNotifyCardRemovedEvent, but it seems that i can't receive 
kTelTelephonyNotification.
What's the problem, and what can I do?

(ErrMessage calls FrmCustomAlert)
thank you.
-- 
For information on using the PalmSource Developer Forums, or to unsubscribe, 
please see http://www.palmos.com/dev/support/forums/