asp.net database connection error

I have the following error An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) On local testing the script is OK but when I upload to the hosted server I get problems. I will give $30 to the first person who can solve this try it yourself : [login to view URL]