Delayed_Jobs Failed: Where to Check Logs/Errors?

I am using delayed_job. It generally works but on one method I am
calling the job always fails.

I checked my rails logs and that does not show anything. The action is
simply completed.

Are there logs or someway to check details on what is happening with
delayed_jobs?

I know when I send it normally/synchronously, it completes successful.
However, when I use delayed_jobs, it fails.

Code Sample:

Class Mailer ...

def report(email,time,name)
   ...
end

Controller

Mailer.send_later(:deliver_report,"jhonovich@gmail.com",time,name)

Any ideas?

Thank you.