My aplication is for loaing the gridview with data from database by using nhibernate and saving the data into database
while running nhibernate application iam getting the following errors:

while loading with gridview:
my code is as follows:
ISession session = NHibernateHttpModule.CurrentSession;


IQuery query = session.CreateQuery("FROM DbUser");
IList result = query.List();

GridView1.DataSource = result;
GridView1.DataBind();
my error is as follows:
in expected: <end-of-text> (possibly an invalid or unmapped class name was used in the query) [FROM DbUser]


while saving the data to database:
my code is as follows:

ISession session = NHibernateHttpModule.CurrentSession;
ITransaction transaction = session.BeginTransaction();

DbUser user = new DbUser();
user.Login = "codegod";
user.Password = "secret";
user.UserData = "vfgfhggfhgh";
session.Save(user);
transaction.Commit();
my error is as follows:
Unknown entity class: NHibernateASPSample.Domain.DbUser
session.save(user);

The DbUser class is not mapped. It's impossible to say why without seeing the code used to initialize the NHibernate configuration. If you are using AddAssembly to load mappings, verify that the hbm.xml files have BuildAction set to EmbeddedResource.