I tried to create a triggered send definition, but it's failing. The same code worked with a different account. It's possible the new account has Triggered Sends disabled somehow (is that possible?) The error I get is:

{:create_response=>{:results=>{:status_code=>"Error", :status_message=>"Exception occurred during [CreateTriggeredSendDefinition] ErrorID: 1548827669", :ordinal_id=>"0", :error_code=>"2", :new_id=>"0", :object=>{:partner_key=>nil, :object_id=>nil, :customer_key=>"xxx", :name=>"Triggered Send - xxx Shared-link Trigger", :description=>"xxx Shared-link triggered send email.", :send_classification=>{:partner_key=>nil, :object_id=>nil, :customer_key=>"Default Transactional"}, :email=>{:partner_key=>nil, :id=>"45100985", :object_id=>nil}, :auto_add_subscribers=>true, :"@xsi:type"=>"TriggeredSendDefinition"}}, :request_id=>"f5d88e80-4ba4-42b8-9098-57b576c15523", :overall_status=>"Error", :@xmlns=>"http://exacttarget.com/wsdl/partnerAPI"}}

What should my next steps be?