Erro no mssql_connect

Warning: mssql_connect() [function.mssql-connect]: Unable to connect to server: SERVIDOR,1433 in c:\arquivos de programas\apache group\Apache\htdocs\rastreamento.php on line 67Alguem poderia me ajudar com esse erro? //Parametros da conexao ao SQL Server 64 $server = "SERVIDOR,1433";65 $username = "sa";66 $password = "grb";67 $sqlconnect = mssql_connect($server, $username, $password);68 $sqldb = mssql_select_db("TEIA", $sqlconnect); //Validando senhaObrigado