It looks like you bound the filter to the recordset columns instead of entering the form element names. lines 16-21 should be something like:
$WADbSearch1->addComparisonFromList("Type","TypeFormElementName","AND","Includes",0);
$WADbSearch1->addComparisonFromEdit("Category","CategoryFormElementName","AND","=",0);
$WADbSearch1->addComparisonFromEdit("Headline","HeadlineFormElementName","AND","Includes",0);
$WADbSearch1->addComparisonFromEdit("MediaDesc","MediaDesc","AND","Includes",0);
$WADbSearch1->addComparisonFromEdit("MediaName","MediaName","AND","Includes",0);
$WADbSearch1->SalesCornerRadioGroup("Media","SalesCornerRadioGroup","AND","=",0);
With the actual form element names used from the search form.