Failed insert or update when add type column long text using NHibernate in VB.NET - vb.net

Question

I'm using Nhibernate 4 and FluentNhibernate 2.0.3 with db Microsoft Access 2000. I can't save the entry on the DB because i'm getting an error when I go to insert the Note field sending a request HTTP POST for example:
{
"Note": "bla bla bla"
}
NOTE: In the database table, the column "Note" is setted as "LONG TEXT" (Not Required)
Could It be a problem of conversion of data Types?
Here's the stack trace:
NHibernate.Exceptions.GenericADOException: could not insert: [Domain.Destinatari#1773][SQL: INSERT INTO `Destinatari` (Note, IDDestinatario) VALUES (?, ?)] ---> System.Data.OleDb.OleDbException: Errore di sintassi nell'istruzione INSERT INTO.
in System.Data.OleDb.OleDbCommand.ExecuteCommandTextErrorHandling(OleDbHResult hr)
in System.Data.OleDb.OleDbCommand.ExecuteCommandTextForSingleResult(tagDBPARAMS dbParams, Object& executeResult)
in System.Data.OleDb.OleDbCommand.ExecuteCommandText(Object& executeResult)
in System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult)
in System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method)
in System.Data.OleDb.OleDbCommand.ExecuteNonQuery()
in NHibernate.JetDriver.JetDbCommand.ExecuteNonQuery()
in NHibernate.AdoNet.AbstractBatcher.ExecuteNonQuery(IDbCommand cmd)
in NHibernate.AdoNet.NonBatchingBatcher.AddToBatch(IExpectation expectation)
in NHibernate.Persister.Entity.AbstractEntityPersister.Insert(Object id, Object[] fields, Boolean[] notNull, Int32 j, SqlCommandInfo sql, Object obj, ISessionImplementor session)
--- Fine della traccia dello stack dell'eccezione interna ---
in NHibernate.Persister.Entity.AbstractEntityPersister.Insert(Object id, Object[] fields, Boolean[] notNull, Int32 j, SqlCommandInfo sql, Object obj, ISessionImplementor session)
in NHibernate.Persister.Entity.AbstractEntityPersister.Insert(Object id, Object[] fields, Object obj, ISessionImplementor session)
in NHibernate.Action.EntityInsertAction.Execute()
in NHibernate.Engine.ActionQueue.Execute(IExecutable executable)
in NHibernate.Engine.ActionQueue.ExecuteActions(IList list)
in NHibernate.Engine.ActionQueue.ExecuteActions()
in NHibernate.Event.Default.AbstractFlushingEventListener.PerformExecutions(IEventSource session)
Below my mapping code:
Public Class DestinatariMap
Inherits ClassMap(Of Destinatari)
Public Sub New()
MyBase.New
LazyLoad()
Id(Function(x) x.IDDestinatario).GeneratedBy().Increment()
Map(Function(x) x.Note)
End Sub
End Class
Here's my Domain code:
Public Class Destinatari
Private _ID_Destinatario As Integer
Private _Note As String
Public Overridable Property IDDestinatario() As Integer
Get
Return Me._ID_Destinatario
End Get
Set
Me._ID_Destinatario = Value
End Set
End Property
Public Overridable Property Note() As String
Get
Return Me._Note
End Get
Set
Me._Note = Value
End Set
End Property
End Class
Thanks