You can't use checkbox fields like that, at least not in DBMan. You can't have more than one option in a checkbox field. It's more like an on/off switch.
What you could do is set up a checkbox field for each type.
Code:
%db_checkbox_fields = (
Trader => 'Trader',
Roaster => 'Roaster',
Importer => 'Importer',
Wholesaler => 'Wholesaler',
Distributor => 'Distributor',
Processor => 'Processor',
Institution => 'Institution',
Machine_Manufacturer => 'Machine Manufacturer',
Producer => 'Producer',
Agent => 'Agent',
Gourmet => 'Dist. Gourmet',
Other => 'Other'
);
Of course, you'll have to have matching fields in your db_def section of your .cfg file, too.
You could possibly have a radio field, but I usually don't use them if there are more than 4 or 5 options. Or you could use a select field.
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JPD