unexpected keyword argument 'mime_type'

I am receiving the error

Error Type
TypeError
Error Value
setDescription() got an unexpected keyword argument 'mime_type'

whenever I try to save a archetype I created. Does anyone have an idea on
the possible problem. I am using Plone 1.0.2 with Archetypes 0.99.1. The
schema I put together is

schema = BaseSchema +  Schema((
    StringField('title',
                searchable = 1,
                required = 1,
                widget = StringWidget(label='Title',
                                      description='Title of the Game
       Event',),
                ),
    StringField('hostname',
                searchable = 1,
                required = 1,
                widget = StringWidget(label='Host Name',
                                      description='Name of the person
       hosting the event',),
                ),
    TextField('description',
              searchable=1,
              required=1,
              allowable_content_types=('text/plain',
                                       'text/structured',
                                       'text/html',),
              widget=TextAreaWidget(label='Description',
                                description='The Description of the
       event',),
              ),
    ))

I thought pretty basic stuff, but its tripping on something. Appreciate the
help!



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