Hello, I have installed scom 2007 R2 on windows 2008 R2 server. I have installed GPRS modem on Com1. Unfortunately I received this critical Alert Notification subsystem failed to send notification using device/server 'Standard 56000 bps Modem' over 'SMS' protocol to 'my mobile phone'. Microsoft.EnterpriseManagement.HealthService.Modules.Notification.SmsNotificationException: Sms error 'Device handle unavailable' (16018). Rule id: Subscription93e257f4_edcb_48a3_9c2f_76ae8cccf16a Can someone help me? Do I need specific Modem, maybe USB connection?