build-dep audacity error 404 [SOLVED]

Hi, I’m a beginner in linux and I was following the instructions in the wiki to download and compile audacity.

I was executing this instruction:

sudo apt-get build-dep audacity

And I’m getting the next errors:

Do you want to continue? [Y/n] y
Err http://es.archive.ubuntu.com/ubuntu/ trusty-updates/main dpkg-dev all 1.17.5ubuntu5.3
  404  Not Found [IP: 91.189.91.15 80]
Err http://es.archive.ubuntu.com/ubuntu/ trusty-updates/main gir1.2-gtk-2.0 amd64 2.24.23-0ubuntu1.1
  404  Not Found [IP: 91.189.91.15 80]
Err http://security.ubuntu.com/ubuntu/ trusty-security/main dpkg-dev all 1.17.5ubuntu5.3
  404  Not Found [IP: 91.189.91.15 80]
Err http://security.ubuntu.com/ubuntu/ trusty-security/universe libavutil-dev amd64 6:9.16-0ubuntu0.14.04.1
  404  Not Found [IP: 91.189.91.15 80]
Err http://security.ubuntu.com/ubuntu/ trusty-security/universe libavcodec-dev amd64 6:9.16-0ubuntu0.14.04.1
  404  Not Found [IP: 91.189.91.15 80]
Err http://es.archive.ubuntu.com/ubuntu/ trusty-updates/main libfreetype6-dev amd64 2.5.2-1ubuntu2.2
  404  Not Found [IP: 91.189.91.15 80]
Err http://security.ubuntu.com/ubuntu/ trusty-security/universe libavformat-dev amd64 6:9.16-0ubuntu0.14.04.1
  404  Not Found [IP: 91.189.91.15 80]
Err http://es.archive.ubuntu.com/ubuntu/ trusty-updates/main libgtk2.0-dev amd64 2.24.23-0ubuntu1.1
  404  Not Found [IP: 91.189.91.15 80]
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/d/dpkg/dpkg-dev_1.17.5ubuntu5.3_all.deb  404  Not Found [IP: 91.189.91.15 80]

E: Failed to fetch http://es.archive.ubuntu.com/ubuntu/pool/main/g/gtk+2.0/gir1.2-gtk-2.0_2.24.23-0ubuntu1.1_amd64.deb  404  Not Found [IP: 91.189.91.15 80]

E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/liba/libav/libavutil-dev_9.16-0ubuntu0.14.04.1_amd64.deb  404  Not Found [IP: 91.189.91.15 80]

E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/liba/libav/libavcodec-dev_9.16-0ubuntu0.14.04.1_amd64.deb  404  Not Found [IP: 91.189.91.15 80]

E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/liba/libav/libavformat-dev_9.16-0ubuntu0.14.04.1_amd64.deb  404  Not Found [IP: 91.189.91.15 80]

E: Failed to fetch http://es.archive.ubuntu.com/ubuntu/pool/main/f/freetype/libfreetype6-dev_2.5.2-1ubuntu2.2_amd64.deb  404  Not Found [IP: 91.189.91.15 80]

E: Failed to fetch http://es.archive.ubuntu.com/ubuntu/pool/main/g/gtk+2.0/libgtk2.0-dev_2.24.23-0ubuntu1.1_amd64.deb  404  Not Found [IP: 91.189.91.15 80]

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
E: Failed to process build dependencies

The internet connection is working right. I’m running ubuntu 14.04.
How can I proceed?
Thank you.

That looks like a problem with your sources.list file.
This topic may help: http://ubuntuforums.org/showthread.php?t=2039398

Thank you!
it is solved