I am trying to upload a widget using widset development kit,devkit by first logging in to the widsets site using the below command at the cmd prompt:

devkit --proxy pryxyaddrort --auth usr pwd --site default login usr pwd

But, I am getting a
"Server responsed: 407 Proxy Authentication Required"

I have all access to the internet.
Can someone tell me how to upload the user defined widgets onto the site.