Atom Feed Issue

Hello everyone,
I write here as after having looked for a solution on the net, including this forum, I can’t figure out a solution for the issue i experience.

My website https://www.idiosuite.com usese WordPress 2.1.1 and in Firefox, when I try to add the feed of my website to my bookmarks with the “Add to Live bookmarks” button on the right of the url textbox, it adds me an empty live bookmark. Practically, it cannot read my website’s feed. I guess the problem is on the feed file itself as if I try to access the feed page at
*https://www.idiosuite.com/feed/atom/*
firefox asks me to save the document as it was an application. Once saved the document, I open it into a texteditor and the code looks fine. I really can’t figure out what the solution could be.
Hope someone can help me. Thanks in advance.

Best regards,
Giorgio