Custom methods on Megawidgets

All,

I seem to be missing something simple here but I can't see it.  I've
created a megawidget that I want to have a public method on with the
following code

CustomWidgetTest.pl
------------------------------
use Tkx;
use CustomWidget;

$mw = Tkx::widget->new(".");
$cw = $mw->new_MyCustomWidget;
$cw->m_Fred();
------------------------------


CustomWidget.pm
------------------------------
package CustomWidget;

use base qw(Tkx::widget Tkx::MegaConfig);

__PACKAGE__->_Mega("MyCustomWidget");
__PACKAGE__->_Config();

sub _Populate {
  my($class, $widget, $path, %opt) = @_;

  my $self = $class->new($path)->_parent->new_frame(-name => $path,
                                                    -class =>
"MyCustomWidget",
                                                   );
  $self->new_ttk__entry(-name => 'e');

  return $self;
}

sub _mpath {
  my $self = shift;
  return $self;
}

sub m_Fred {
  print "FRED\n";
}

1;
------------------------------

When I try to use the m_Fred() method, $cw->m_Fred(), I get a 'bad option
"Fred": must be cget or configure' error.  What else do I need to do to
register the method?

Thanks,
Scott

----------------------------------------------------------------------
Scott Parrill
Information Technology Specialist
Enterprise Technology Services /
Wyoming State Geological Survey
State of Wyoming
P.O. Box 1347
Laramie, WY  82073
Phone:  307-766-2286 x242
Fax:    307-766-2605
E-mail: [email protected]<https://uwmail.uwyo.edu/owa/redir.aspx?C=4dc4ce62e583463fb8ad86380018935b&URL=mailto%3aScott.Parrill%40wyo.gov>
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E-Mail to and from me, in connection with the transaction of public
business, is subject to the Wyoming Public Records Act and may be
disclosed to third parties.
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E-Mail to and from me, in connection with the transaction 
of public business, is subject to the Wyoming Public Records 
Act and may be disclosed to third parties.