Feed not available at this time! Error message: on using SPRSS.wsp


I have deployed SPRSS.wsp on the server and everything is working fine on the server, the feeds are getting displayed in the site, I have read the rss feeds of a list within an intranet portal.Everything is working fine on server, but when other users login to the site it is giving the error below:
Feed not available at this time! Error message:
System.Net.WebException: The remote server returned an error: (401) Unauthorized.
at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request)
at System.Net.WebClient.DownloadData(Uri address)
at System.Net.WebClient.DownloadData(String address)
at SPRSS.WebParts.RSSRender.Render(HtmlTextWriter writer)
RSS Url: http://myexensys/_layouts/listfeed.aspx?List=%7B6A970885%2D8FD6%2D45B8%2DBF37%2D41D766EAAABF%7D
Please let me know where is the problem and help me to solve this error.