I have Visual studio 2010 Premium installed on Windows 7. When I try to connect to an online gallery or online template, I get an error message like this:
The following worked for me, I got this from the blog entry listed below.
in the devenv.exe.config file, in the section add:
reference: http://gurustop.net/blog/2010/08/10/visual-studio-2010-extension-manager-online-gallery-behind-internet-proxy/