Raven MoreLikeThis Not working

UserProfile.cs

public class UserProfile
	{
		public string Id { get; set; }

		public string Name { get; set; }

		public string Hometown { get; set; }

		public DateTime FromDate { get; set; }

		public DateTime ToDate { get; set; }

		public string Neighbourhood { get; set; }

		public string TravellingWith { get; set; }

		public List<string> Interests { get; set; }

		public UserProfile()
		{
			Interests = new List<string>();
		}
	}

UserProfileIndex.cs

public class UserProfileIndex : AbstractIndexCreationTask<UserProfile>
	{
		public UserProfileIndex()
		{
			Map = profiles => from profile in profiles 
							  select new
							  {
								  profile.ToDate,
								  profile.FromDate,
								  profile.Hometown,
								  profile.Neighbourhood,
								  profile.TravellingWith,
								  profile.Interests
							  };

			Stores = new Dictionary<Expression<Func<UserProfile, object>>, FieldStorage>()
			{
				{
					x => x.ToDate, FieldStorage.Yes
				},
				{
					x => x.FromDate, FieldStorage.Yes
				},
				{
					x => x.Hometown, FieldStorage.Yes
				},
				{
					x => x.Neighbourhood, FieldStorage.Yes
				},
				{
					x => x.TravellingWith, FieldStorage.Yes
				},
				{
					x => x.Interests, FieldStorage.Yes
				}
			};

			Index(x => x.ToDate, FieldIndexing.Analyzed);
			Index(x => x.FromDate, FieldIndexing.Analyzed);
			Index(x => x.Hometown, FieldIndexing.Analyzed);
			Index(x => x.Neighbourhood, FieldIndexing.Analyzed);
			Index(x => x.TravellingWith, FieldIndexing.Analyzed);
			Index(x => x.Interests, FieldIndexing.Analyzed);
		}
	}