Docker login returning a 404 HTML page on the CLI

OS

# uname -r
2.6.32-696.13.2.el6.centos.plus.x86_64

docker version

# docker version
Client version: 1.7.1
Client API version: 1.19
Go version (client): go1.4.2
Git commit (client): 786b29d/1.7.1
OS/Arch (client): linux/amd64
Server version: 1.7.1
Server API version: 1.19
Go version (server): go1.4.2
Git commit (server): 786b29d/1.7.1
OS/Arch (server): linux/amd64

The Problem

When I tried to pull any private image Ihave from Docker hub I got that message

Error: image webforce/my-image:latest not found

Entering in http://hub.docker.io I discover that my password was not working anymore because I should change to a 9 letters password at least. I’ve created a new password and logged on my PC cli.

Everything seemed to be fine when I pulled the image in my computer.
But the server could not do even the ‘‘docker login’’ command.

First of all the ‘‘docker login’’ command asks for username, password AND email (???). When i set all correct credentials it retruned an error:

Error response from daemon: Unexpected status code [404] : <!doctype html>
<html lang=“en”>

<head>
<meta charset=“utf-8”>
<title>404 : Docker</title>

I tried to login especifing whe docker hub regestry url that seemed to work but continues to not pulling any image.

# docker login https://index.docker.io
Username: webforce
Password:
Email: my@email.com.br
WARNING: login credentials saved in /root/.docker/config.json
Login Succeeded

# docker pull webforce/my-image:latest
Pulling repository webforce/my-image
Error: image webforce/my-image:latest not found

I think it is possibleto be the docker cli version but my server is very old and a new version of docker can not bee installed because the kernel is too old. If that is the case is there any workaround to do?

Any help is Welcome.
Thanks!