CaRP : Caching RSS Parser : Error : Unknown Format

CaRP: Caching RSS Parser - Documentation

The document that you asked CaRP to process is not in RSS format.

You entered the URL of an Atom feed: CaRP does not process Atom feeds, only RSS. To use this feed with CaRP, you will need to either find an RSS version of it, or use a tool like Grouper Evolution to convert it to RSS.
You entered the URL of an XML document that is in a format other than RSS: You may be able to use the document with CaRP by using a tool like Grouper Evolution to convert it to RSS, but doing so will require some custom programming.
You entered the URL of a webpage instead of an RSS feed: Load the URL in your web browser and see whether what comes up is an RSS feed or not. If not, enter the URL of an RSS feed.
The publisher of the feed moved or removed it from their server: Load the URL in your web browser and see whether what comes up is an RSS feed or not. If the URL used to point to a feed, but it is gone, you should see an error message. In any case, if it is not an RSS feed, you'll need to enter the URL of an RSS feed.