Hey guys I tried my application on my friends computer and it worked, had to change the connection string. Now I am back on my own computer the following error has occured, I have looked at general help for this error and tried the help given but it hasn't worked, any idea on what could have gone wrong, thanks in advance.
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)