I'm presenting this error when trying to export the employees from the HR module:

OpenERP WebClient Error
Client Traceback (most recent call last):
File "/usr/lib/pymodules/python2.7/openerp/addons/web/http.py", line 204, in dispatch
response["result"] = method(self, **self.params)
File "/usr/lib/pymodules/python2.7/openerp/addons/web/controllers/main.py", line 1480, in get_fields
key=lambda field: field[1].get('string', ''))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 13: ordinal not in range(128)

Already allowed users to import/export data in csv. On setting page...

Anyone can shed some light on this? I really need to make a backup :(

Thanks in advance