.net - C# Exception when remotely connection to SQL Server 2005 instance -

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trying connect sql server 2005 instance remotely getting following exception:

a network-related or instance-specific error occurred while establishing connection sql server. server not found or not accessible. verify instance name correct , sql server configured allow remote connections. (provider: sql network interfaces, error: 26 - error locating server/instance specified)

have checked , server enabled accept remote connections. connection string i'm using in .net looks this:

data source=serverip\instance;initial catalog=databasename;user id=username;password=password;

any ideas? thank :)

you might want try quick telnet tcp port 1433 of server see if can establish connection way. 

telnet remote_name_or_ip 1433

if can't, know it's @ network layer, , can start checking things windows firewall or other network pieces might in way. (you need access via udp port 1434.)


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