Use just name instead of firstname & lastname.

lib/active_merchant/billing/gateways/payflow/payflow_common_api.rb

@@ -122,8 +122,7 @@ def build_reference_request(action, money, authorization, options)
       def add_address(xml, tag, address, options)
         return if address.nil?
         xml.tag! tag do
-          xml.tag! 'FirstName', address[:first_name] unless address[:first_name].blank?
-          xml.tag! 'LastName', address[:last_name] unless address[:last_name].blank?
+          xml.tag! 'Name', address[:name] unless address[:name].blank?
           xml.tag! 'EMail', options[:email] unless options[:email].blank?
           xml.tag! 'Phone', address[:phone] unless address[:phone].blank?
           xml.tag! 'CustCode', options[:customer] if !options[:customer].blank? && tag == 'BillTo'

test/unit/gateways/payflow_test.rb

@@ -288,9 +288,9 @@ def test_timeout_is_same_in_header_and_xml
     assert_match /Timeout="#{timeout}"/, xml
   end
 
-  def test_first_and_last_name_fields_are_included
+  def test_name_field_are_included_instead_of_first_and_last
     @gateway.expects(:ssl_post).returns(successful_authorization_response).with do |url, data|
-      data =~ /FirstName/ && data =~ /LastName/
+      data !~ /FirstName/ && data !~ /LastName/ && data =~ /<Name>/
     end
     response = @gateway.authorize(@amount, @credit_card, @options)
     assert_success response