Well, if you can post the URL you are using, I may be able to help you out. Also, what 'New Reader' module are you using? Is it the default DNN New Feeds (RSS) module, or another. Generally, the default module renders simple newsfeeds, and I suspect the one you are using is another type. The important piece to remember is that not all newsfeed sources create their feeds in quite the same way. This means that it usually becomes necessary to create a custom XSL file to render a feed in a manner that you want.
IE7, and FireFox have built in support for various types of newsfeeds, and can render them in mostly acceptable fashion, although, I prefer using custom xsl's because I gain a level of control of the items displayed. Some newsfeeds contain scripting, and HTML which could cause security issues down the line, and knowing a newsfeed source and inspecting it before publically putting it into my DNN site is always something I will do.
The reference provided in the previous post will render simple RSSv2.0 newsfeed sources, but if there are any additional namespace included in a newsfeed, even that xsl will need tweaking to suit your need.
I've posted quite a few examples in this forum, and in the previous forum, which can be used as starting points in your work.
Cheers,
iwonder