Cannot add external RSS feeds

I am having difficulty adding external RSS feeds (outside our company firewall). It gives me the error message 'Unable to add feed. Please double check the URL specified'. I'm running IE7B3 and have no problem with adding the same feed to it. I also have the same feed working in FeedDemon and NewsGator.

Do I have some kind of CS security problem? I have my website security set for Windows Authentication but I have made no modifications to CS. Do I need to be running the Windows Authentication Modules from the Security Add-On?

Any help would be appreciated. Thanks - Mark.

I'm having the same problem.

I'm behind a company firewall and browsers have to be configured to use an http proxy. 

I just wonder if the Community Server app is trying to access external sites without using a proxy. 

 

answering my own question . . .   just set the proxy config into the CS config file as descibed in this post.