Command hanlder Exception:CreateOrUpdateCatetgorycommand not found

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ASP.NET

MVC

WebAPI

Hi I am using EFMVC template in that i am using both mvc controllers and api controller in same application. but while creating updating and deleting it gives error: Command handler exception: CreateOrUpdateCommand not found in DEfaultCommandBus file.
Here is my DefaultCommandBus:

using System.Collections.Generic;
using System.Web.Mvc;
using EFMVC.CommandProcessor.Command;
using EFMVC.Core.Common;

namespace EFMVC.CommandProcessor.Dispatcher
{
    public class DefaultCommandBus : ICommandBus
    {
        public ICommandResult Submit<TCommand>(TCommand command) where TCommand: ICommand
        {
      ICommandHandler<TCommand> handler = DependencyResolver.Current.GetService<ICommandHandler<TCommand>>();//Exeption causing returning null value 
            if (!((handler != null) && handler is ICommandHandler<TCommand>))
            {
                throw new CommandHandlerNotFoundException(typeof(TCommand));
            }  
            return handler.Execute(command);
 
        }
        public IEnumerable<ValidationResult> Validate<TCommand>(TCommand command) where TCommand : ICommand
        {
            IValidationHandler<TCommand> handler = DependencyResolver.Current.GetService<IValidationHandler<TCommand>>();//Exeption causing returning null value 
            if (!((handler != null) && handler is IValidationHandler<TCommand>))
            {
                throw new ValidationHandlerNotFoundException(typeof(TCommand));
            }  
            return handler.Validate(command);
        }
    }
}

Unity Configuration.cs in App start folder:

using Autofac.Integration.Mvc;
using EFMVC.CommandProcessor.Command;
using EFMVC.CommandProcessor.Dispatcher;
using EFMVC.Data.Infrastructure;
using EFMVC.Data.Repositories;
using EFMVC.Domain.Commands;
using EFMVC.Domain.Handlers;
using EFMVC.Web.Core.Authentication;
using Microsoft.Practices.Unity;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Security;
using Unity.Mvc4;

namespace EFMVC.Web.API.App_Start
{
    public class UnityConfiguration
    {
        public static void ConfigureIoCContainer()
        {
            IUnityContainer container = new UnityContainer();

            DependencyResolver.SetResolver(new UnityDependencyResolver(container));

            RegisterTypes(container);
        }

        private static void RegisterTypes(IUnityContainer container)
        {
            container.RegisterType<ICommandBus ,DefaultCommandBus>(new TransientLifetimeManager());
            container.RegisterType<IDatabaseFactory, DatabaseFactory>(new TransientLifetimeManager());
            container.RegisterType<ICategoryRepository, CategoryRepository>(new TransientLifetimeManager());
            container.RegisterType<IEventRepository, EventRepository>(new TransientLifetimeManager());
            container.RegisterType<IPhotoRepository, PhotoRepository>(new TransientLifetimeManager());
            container.RegisterType<INewsRepository, NewsRepository>(new TransientLifetimeManager());
            container.RegisterType<INotificationRepository, NotificationRepository>(new TransientLifetimeManager());
            container.RegisterType<IUserRepository, UserRepository>(new TransientLifetimeManager());
            container.RegisterType<IUserDetailRepository, UserDetailRepository>(new TransientLifetimeManager());
            container.RegisterType<IFormsAuthentication, DefaultFormsAuthentication>(new TransientLifetimeManager());
            container.RegisterType<ICommandResults, CommandResults>(new TransientLifetimeManager());
            container.RegisterType<IUnitOfWork, UnitOfWork>(new TransientLifetimeManager());
            container.RegisterType<IDisposable, Disposable>(new TransientLifetimeManager());
            container.RegisterType<IDependencyResolver, AutofacDependencyResolver >(new TransientLifetimeManager());
        }
    }
}

Post action in Category Controller:

[HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Save(CategoryFormModel form)
        {
            if (ModelState.IsValid)
            {
                Mapper.CreateMap<CategoryFormModel, CreateOrUpdateCategoryCommand>();
                var command = Mapper.Map<CategoryFormModel, CreateOrUpdateCategoryCommand>(form);
                IEnumerable<ValidationResult> errors = commandBus.Validate(command);
                ModelState.AddModelErrors(errors);
                if (ModelState.IsValid)
                {
                    var result = commandBus.Submit(command);
                    if (result.Success) return RedirectToAction("Index");
                }
            }
            //if fail
            if (form.CategoryId == 0)
                return View("Create", form);
            else
                return View("Edit", form);
        }

Can anyone help regarding this issue.
-Thanks sindhu