[imp] Attach ".txt" file problem.

[Somsak RAKTHAI]

Dear sir,
  I used horde-1.2.3 and imp-2.2.3. (old version.)
  When I attach file type ".txt", ".c" and my friend
read my mail with "imp-2.2.3", the content of
attach file was shown in the body of mail.
Not separate at attach part. I want to show
separate only file name at attach part.
  Please let me know how to solve this problem.
          Thank you very much.
              regards,
              Somsak.