from substring uppercase issue

using cck, i've created a content (which is a date) that is called 'field_from_date_event'. If i try to add this field to a view, the 'form' substring of 'field_from_date_event' is changed to uppercase, which ends up in an error in the query :

user warning: Unknown column 'node_data_field_FROM_date_event.field_from_date_event_value' in 'field list' query