A transport-level error has occurred when sending the request to the server. (provider: Shared Memory Provider, error: 0 - No pr

连接SQL2005 Express版本的时候出现本问题，连接代码代替如下：string dbName = "server=.\\sqlexpress;uid='sa';pwd='123'";
   void createDB(string database)
    {
        //Create database "stormdb" 
        string dbCmd = "create database stormdb";
        runSQLCmd(dbName, dbCmd, "Create Database OK.<br>");
        // Reopen to create table
        string dbName1 = dbName + ";database='" + database + "'";
        string tbCmd = "create table tb_login("
            + "lno int identity(1,1) primary key,"
            + "lname varchar(20) unique,"
            + "lpassword varchar(20) not null)";
        runSQLCmd(dbName1, tbCmd, "Create table OK.<br>");
    }
 void runSQLCmd(string datebase, string cmd, string result)
    {
        SqlConnection sqlConn;
        string sqlConnStr = datebase;
        SqlCommand sqlCmd;
        string sqlCmdStr = cmd;
        try
        {
            sqlConn = new SqlConnection(sqlConnStr);
            sqlConn.Open();
            sqlCmd = new SqlCommand(sqlCmdStr, sqlConn);
            sqlCmd.ExecuteNonQuery();
            sqlConn.Close();
            labError.Text += result;
        }
        catch (Exception ex)
        {
            labError.Text = ex.Message;
        }
    }调用createDB时容易出错，请教大家，谢谢了