Entity framework 5.0 , database is never created

//The MailType enum is the driving factor for email template engine. This is basically a vocab for all possible email types
   public enum MailType
   {
       Unknown,
       Success,
       Failure
   }

   public class GeneralQuestion
   {
       [Key]
       public int GeneralQuestionID { get; set; }
       public string ProjectStream { get; set; }
       public bool? PBBIT { get; set; }
       public bool? CIBIT { get; set; }
       public bool? ROA { get; set; }
       public bool? GEF { get; set; }
       public bool? International { get; set; }
       public DateTime CreatedOn { get; set; }

       //-------------------   Foreign Key to GQ table  -------------------------------------------------------//
       public int DetailedQuestionID { get; set; }
       public virtual DetailedQuestion DetailedQuestions { get; set; }

       //-------------------  collection of uploaded documents associated with this GQ  ----------------------//
       public virtual ICollection<FSSTSSDucument> FSSTSSDucuments { get; set; }
       public virtual ICollection<SRDDRDDucument> SRDDRDDucuments { get; set; }
       public virtual ICollection<SolutionArchitectureDucument> SolutionArchitectureDucuments { get; set; }

   }

public class GeneralQuestionContext : DbContext
    {
        public GeneralQuestionContext()
            : base("GeneralQuestionContext")
           // was : base("DBConnectionString")
        {
        }

        //properties to retrieve table entities
        public DbSet<GeneralQuestion> GeneralQuestions { get; set; }
        public DbSet<DetailedQuestion> DetailedQuestions { get; set; }
        public DbSet<FSSTSSDucument> FSSTSSDucuments { get; set; }
        public DbSet<SRDDRDDucument> SRDDRDDucuments { get; set; }
        public DbSet<SolutionArchitectureDucument> SolutionArchitectureDucuments { get; set; }
    }

public class GeneralQuestionModelInitializer : DropCreateDatabaseIfModelChanges<GeneralQuestionContext>
    {
        protected override void Seed(GeneralQuestionContext context)
        {
            GetGeneralQuestions().ForEach(g => context.GeneralQuestions.Add(g));
            base.Seed(context);
        }

        private static List<GeneralQuestion> GetGeneralQuestions()
        {
            var generalQuestions = new List<GeneralQuestion> {
                new GeneralQuestion
                {
                  GeneralQuestionID = 1,     
                  ProjectStream = "Testing Project Stream 1",      
                  PBBIT = true,
                  CIBIT = true,
                  ROA = false,
                  GEF = false,
                  International = false,
                  CreatedOn = DateTime.Now
                },
                new GeneralQuestion
                {
                  GeneralQuestionID = 2,     
                  ProjectStream = "Testing Project Stream 2",      
                  PBBIT = false,
                  CIBIT = false,
                  ROA = false,
                  GEF = false,
                  International = false,
                  CreatedOn = DateTime.Now
                }
            };
            return generalQuestions;
        }
    }

public class Global : HttpApplication
  {
      void Application_Start(object sender, EventArgs e)
      {
          // Code that runs on application startup
          BundleConfig.RegisterBundles(BundleTable.Bundles);
          AuthConfig.RegisterOpenAuth();
          //RouteConfig.RegisterRoutes(RouteTable.Routes);

          //--  Tell the DB which initial model class to use  --//
         Database.SetInitializer<GeneralQuestionContext>(new GeneralQuestionModelInitializer());
      }

private void SaveAndProcess()
       {
           try
           {
             if (ValidateGeneralQuestion())
             {
               string currSession = Session["Name"].ToString();

               GeneralQuestion objGQ = new GeneralQuestion();

               objGQ.ProjectStream = ProjectList.SelectedValue;
               objGQ.CreatedOn = DateTime.Now;

               if (inputCIBIT.Checked)
               {
                   objGQ.CIBIT = true;
               }

               if (inputGEF.Checked)
               {
                   objGQ.GEF = true;
               }

               if (inputPBBIT.Checked)
               {
                   objGQ.PBBIT = true;
               }

               if (inputROA.Checked)
               {
                   objGQ.ROA = true;
               }

               if (inputInternational.Checked)
               {
                   objGQ.International = true;
               }
                  // _db.GeneralQuestions.Add(objGQ);
                   _db.SaveChanges();

                   lblMsg.ForeColor = Color.Green;
                   lblMsg.Text = "Record Saved Successfully.";

                   Response.Redirect("Database_Details.aspx");
               }
               else
               {
                  // lblMsg.Text = "Validation failed - Not processed.";
                   lblMsg.ForeColor = Color.Red;
               }
           }
           catch (Exception exx)
           {
               Response.Write(exx.Message);
           }
           finally
           {
               Utilities.ResetAllControls(this);
           }
       }