1. At the windows command prompt, enter the telnet server ip port number, and the port 1433 can be omitted.

The server connection is normal, as shown in the figure, and the flashing cursor returns:

Server failure or incorrect port number and IP will cause the following errors:

2. Check whether the RPC remote connection of the server is open.

3. If it is SQL2000, please check whether the SP4 patch is installed.