.net - Fluent NHibernate 1.2 + NHibernate 3.0, specify table name Options -

i new nhibernate, , doing first project. have simple table named "user", has columns of

userid, firstname, lastname, username, password.

and created entity class:

    public class useraccount {              public virtual int? userid {                      get;                      private set;              }                [required(errormessage = "please enter username.")]              public virtual string username {                      get;                      private set;              }                [required(errormessage = "please enter password.")]              public virtual string password {                      get;                      private set;              }                public virtual string firstname {                      get;                      private set;              }                public virtual string lastname {                      get;                      private set;              }      }  

i created mapping class:

    public class useraccountmap : classmap<useraccount> {              public useraccountmap() {                      table("user");                      id(x => x.userid, "userid");                      map(x => x.firstname, "firstname").length(50)                              .not.nullable();                      map(x => x.lastname, "lastname").length(50)                              .not.nullable();                      map(x => x.username, "username").length(50)                              .not.nullable();                      map(x => x.password, "password").length(50)                              .not.nullable();              }      }  

here try map useraccount object user table.

this configuration:

            private static isessionfactory createsessionfactory() {                      return fluently.configure()                              .database(mssqlconfiguration.mssql2008                                      .connectionstring(c => c.fromconnectionstringwithkey("testdb"))                                      .cache(c => c.usequerycache().useminimalputs())                                      .defaultschema("dbo")                                      .showsql())                              .mappings(m => m.fluentmappings.addfromassemblyof<useraccount>())                              .buildsessionfactory();                }  

and method select database:

                    using (var session = createsessionfactory()) {                              var query = in session.queryover<useraccount>()                                                      a.username == "myusername"                                                      select a;                               var oneaccount = query.singleordefault();                               return oneaccount;                      }  

but when run application, got exception message:

nhibernate.exceptions.genericadoexception unhandled message=could not execute query  [ select this_.userid userid0_0_, this_.firstname firstname0_0_,  this_.lastname lastname0_0_, this_.username username0_0_,  this_.password password0_0_ [useraccount] this_  this_.username = @p0 ]  positional parameters:  #0>myusername  ....    source=nhibernate  ....  message=invalid object name 'useraccount'.  

it looks have not mapped class table name. clue why that?