Error 26 on SQL Server 2008

Question

I have prepared a program with Visual Basic 2010 and I am using a SQL Server 2008 database. (service based database) it works properly. But sometimes (when I don't use computer for a period like 2 hours) I try to start my program on VB (F5), it waits, and then gives this error:

A network-related or instance-specific error occured while establishing a connection to SQL Server. The server was not found or is not accesible. Verify that the instance name is correct and that SQL Server name is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified.)

I have googled it, but nothing helps. I'm afraid this error will be a problem when the user uses the program. How might I solve this?

Answer 1

Probably the network connection turn off after some time. Check System Operating power setting's option