Exception thrown trying to create a DB with SMO C#

USE [master]
GO
/****** Object:  Database [bioenergiasIpad]    Script Date: 08/07/2012 17:01:19 ******/
CREATE DATABASE [test1] ON  PRIMARY 
( NAME = N'test1', 
  FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA\test1.mdf', 
  SIZE = 70656KB , MAXSIZE = UNLIMITED, FILEGROWTH = 1024KB)
 LOG ON 
( NAME = N'test1_log', 
  FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA\test1_log.ldf', 
  SIZE = 164672KB , MAXSIZE = 2048GB , FILEGROWTH = 10%)
GO

Console.WriteLine("Enter username");
        string UserName = Console.ReadLine();
        Console.WriteLine("Enter password");
        string Password = Console.ReadLine();

        string connectionString = null;
        SqlConnection cnn ;

        Server server = new Server();
        server.ConnectionContext.LoginSecure = true;
        try
        {
            connectionString = @"Data Source=" + server.Name + @"\Administrator" +
                            @"AttachDbFilename=|DataDirectory|Resources\DataBase." + UserName + ".mdf;" +
                             "Integrated Security=True;";
            Database database = new Database(server, "DataBase." + UserName);
            database.FileGroups.Add(new FileGroup(database, "PRIMARY"));
            DataFile dtPrimary = new DataFile(database.FileGroups["PRIMARY"],
                     "PriValue", @"Resources\DataBase." + UserName + ".mdf;");
            dtPrimary.Size = 77.0 * 1024.0;
            dtPrimary.GrowthType = FileGrowthType.KB;
            dtPrimary.Growth = 1.0 * 1024.0;
            database.FileGroups["PRIMARY"].Files.Add(dtPrimary);

            LogFile logFile = new LogFile(database, "Log",
                    @"Resources\DataBase." + UserName + ".ldf");
            logFile.Size = 7.0 * 1024.0;
            logFile.GrowthType = FileGrowthType.Percent;
            logFile.Growth = 10.0;

            database.LogFiles.Add(logFile);
            database.Create();
            database.Refresh();
        }