bad file format on server.cfg

[Mono]

Binary package hint: ntlmaps

When I try to edit the /etc/ntlmaps/server.cfg with vim (sudo vim /etc/ntlmaps/server.cfg) I saw that the file have an "^M" at the end of each file. So, the server doesn't respond to apt commands when also i configure it in /etc/apt/apt.conf rightly.
When I replace de original server.cfg file for an older one of another ntlmaps server, with the same configuration fields correctly seted, all works fine.

$lsb_release -rd
Description: Ubuntu 8.04.2
Release: 8.04

$ apt-cache policy ntlmaps
ntlmaps:
  Instalados: 0.9.9.0.1-7
  Candidato: 0.9.9.0.1-7
  Tabla de versión:
 *** 0.9.9.0.1-7 0
        500 http://ar.archive.ubuntu.com hardy/universe Packages
        100 /var/lib/dpkg/status