body of email not displaying with attachments in rails2.3.5

I am sending an email through my application to other user's gmail id. I
am receiving email and it works fine without attachment. But when I
attach a file, the mail which users receive contain subject and
attachments only. The body part is not displaying in the mail. In the
controller I am passing everything as params to reminder_email method. I
am using rails2.3.5..This is how I have implemented in my mailer.rb
file. Please help.

    class ReminderMailer < ActionMailer::Base

      def reminder_email(sender,recipients, subject,
message,attachments)
        recipient_emails = (recipients.class == String) ?
recipients.gsub(' ','').split(',').compact : recipients.compact
        setup_reminder_email(sender, recipient_emails, subject,
message,attachments)
      end

      protected
      def setup_reminder_email(sender, emails, subject, message,files)
        @from = sender
        @recipients = emails
        @subject = subject
        @sent_on = Time.now
        @body['message'] = message
        #content_type = "multipart/alternative"
         files.each do |file|
          attachment "application/octet-stream" do |a|
          a.body = file.read
          a.filename = file.original_filename
        end unless file.blank?
        end
      end
    end

def email_with_attachments(application_fields={},files=[])

@headers = {}

@sent_on = Time.now

@recipients = ‘client@domain.com’

@from = ‘info@domain.com’

@subject = ‘Here are some file attachments’

application_fields.keys.each {|k| @body[k] = application_fields[k]}

attach files

files.each do |file|

attachment “application/octet-stream” do |a|

a.body = file.read

a.filename = file.original_filename

end unless file.blank?

end

end