ODBC SQL Syntax

I am trying to execute the SQL:

String sql = @"
            select
            companyname, customer_id, parent_id, customer_type_id, status, employee_count, total_employee_count, member_count, eap_model_id, custom_dnn, pa_company_name, foreignid, processnotes, red_flag, isinactive 
            from Customers
            where
            isinactive = 'NO'
            and is_person = 'NO' ";

and get 0 rows in the result. There are definitely 35,000 records that match this query, can anyone explain why it does not return data?  BTW, if i do select * from customers i get records and some of those fullfil this where clause...

thanks,
mike