[web2py] Operational Error

[Eduardo]

Hello,

I generated a new simple app  through "New Simple Application" and
then changed its db.py to the following:

db = DAL('sqlite://MyDB.sqlite')



db.define_table('estudantes',

    # DADOS PESSOAIS

    Field('Nome', 'string'),

    Field('Pais', 'string'),

    Field('Nascimento', 'date'),

    Field('Sexo', 'string'),

    Field('Email', 'string'))

Well, now every time I try to insert a new entry via appadmin, I get
an Operational Error message:

Traceback (most recent call last):
  File "/home/eduardo/web2py/gluon/restricted.py", line 188, in
restricted
    exec ccode in environment
  File "/home/eduardo/web2py/applications/teste4/controllers/
appadmin.py", line 412, in <module>
  File "/home/eduardo/web2py/gluon/globals.py", line 95, in <lambda>
    self._caller = lambda f: f()
  File "/home/eduardo/web2py/applications/teste4/controllers/
appadmin.py", line 127, in insert
    if form.accepts(request.vars, session):
  File "/home/eduardo/web2py/gluon/sqlhtml.py", line 1186, in accepts
    self.vars.id = self.table.insert(**fields)
  File "/home/eduardo/web2py/gluon/dal.py", line 3952, in insert
    return self._db._adapter.insert(self,self._listify(fields))
  File "/home/eduardo/web2py/gluon/dal.py", line 717, in insert
    raise e
OperationalError: near ")": syntax error


What am I missing here?

Eduardo