Have you configured APT to use the proxy?
For instance in /etc/apt/apt.conf you should have a line similar to:
Acquire::http::Proxy "http://www-cache.strath.ac.uk:8080/";
Have you configured APT to use the proxy?
For instance in /etc/apt/apt.conf you should have a line similar to:
Acquire: :http:: Proxy "http:// www-cache. strath. ac.uk:8080/";