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i have 12.04 LTS but i have a strange problem from a while

every time i try to do an update an error window apears with "check your internet connection"

and i have tried to update file by file which was boring and very not exciting

finally I found 4 files those was the problem

libproxy1 (size: 57kB) libproxy1-plugin-gsettings (size : 22kB) libproxy1-plugin-networkmanager (size :7kB) python-libproxy (size:5kB)

by the way i tries to change the server and this problem still the same please give a way to end this problem because every time i need to update i have to look for those files and excludes them from the update .... try to look for them into 170 files (I did)

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Just try to do it from console with these commands:

sudo apt-get update
sudo apt-get dist-upgrade

If the later command fails, comment here with the a link to the full output on Ubuntu Pastebin please.

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