Problem saving and playing Real Audio file

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I'm trying to download and save a real audio file. The ram file leads to a smi file that then leads to an mp3 file at a rtsp://www.someplace.com:554/hei.mp3

Why is the smi file pointing to an mp3 file? When I play the file through the link on the website, it uses Real Audio to play it.

The downloading software (Streambox and Flashget) download the file but it gets saved as an ra file. When I play the file, it's very choppy for 10 seconds and then stops. Changing the extension to mp3 doesn't work.

Any ideas what's wrong? I've tried changing download connection speeds, renaming the files.

Thanks for any leads.