RSS feeds of new emails

[Mazead]

Hello,
I am unable to subscribe to RSS feeds generated by roundcube.
I'm also using the RSSfeeds plugin. But,I am unable to subscribe to RSS feeds using any software. I can view the parsed RSS on Firefox and IE. But,I am unable to subscribe using any RSS reader software..They all show an error message that its an invalid feed.I've tried a couple of programs but all of em I've tried so far say that the feed is invalid.

Any help appreciated..

Thank You...