i get coneccted throug a Squid proxy server, from my browser my connection works fine with the right setings (proxy address : port , user & pass) but when i set up the synaptic and other applications to get connected always them give me the error 407 Proxy Authentication Required (with the correct auth settings insted)

i know that this issue is due the type of authentication that this applications send to the squid who not recognize it, but i dont know how to configure it well to get it work just fine.

please i will need some help or suggestion where & what i have to set at the Squid to enable the authentication that it needs to recognize for this applications get connected.