After configuring. RRAS console on both sides always shows connected status. But there are some breakdown connections, with ping request time out. At the same time the localVPN side event viewer reports: Error: 21056 -An error has been returned by the <MBCStoGUID> API. API error code: 0000001FH. API error text: A device attached to the system is not functioning. Error: 21074 Failed to process a notification of a network configuration change. My Configuration: C:\>ipconfig Windows 2000 IP Configuration Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 10.10.1.2 Subnet Mask . . . . . . . . . . . : 255.0.0.0 Default Gateway . . . . . . . . . : Ethernet adapter ADSL Connection: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 192.168.254.1 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.254.254 PPP adapter RAS Server (Dial In) Interface: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 10.10.1.208 Subnet Mask . . . . . . . . . . . : 255.255.255.255 Default Gateway . . . . . . . . . : PPP adapter {8101C152-D63C-4905-952F-171977CA0EAF}: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 192.168.1.101 Subnet Mask . . . . . . . . . . . : 255.255.255.255 Default Gateway . . . . . . . . . : Any help, Thanks in advance!