The enclosure in RSS feed doesn't work for Itune

Question

I subscribed to my podcast rss feed to ITune, which was valid and had been tested successfully with other aggregator such as Ipodder, however, it doesn't work for ITune. When I hit "get" button next to my podcast name, I always get "!" sign in front of the name, and when I clicked it, I got error message "There was a problem downloading 'XXXXX'. The network connection could not be made".
I'm not sure if this problem resulted from the "rewrite" function I used on my podcasting server in order to track the downloading. Here is how it works: When a mp3 file is requested, my web server will redirect the request to another asp.net program to do something and then redirect to the real mp3 file for downloading. Can it be problem in Itune? But I can use this enclosure url to download this mp3, and also the Ipodder works file with this rss feed.
Any help will be appreciated.
Leo
  Windows XP  

Answer 1

Thanks for your reply.
However, according to the iTune specs as following,
Tracking Usage
Please note that iTunes does not provide usage statistics. Some podcasters have created mechanisms for tracking the number of times that each episode has been downloaded. iTunes does not provide support in how to track downloads, but the following notes may be helpful:
* 302s will be followed to a depth of 5 redirects and will not update the feed URL in the directory.
* The URL before the GET-style form values (before the first ?) must end in a media file extension (e.g. mp3). To work around this, the feed provider can alter their URL from this:
http://www.podcaster.com/load.php?f=&Wipeout.php
to this:
http://www.podcaster.com/load.mp3?f=&Wipeout.mp3
Notice how it says load.mp3 instead of load.php. It should be possible to accomplish this via various means, such as web server rewrites. iTunes looks at the extension of the path part of the url, i.e. the part before the”?”.
The http request redirection is allowed as long as the appropriate file extension such as ".mp3" is used.
By the way, I tested it with "no redirection" version, which worked fine.
Leo