RSS problem with MM_XSLTransform()

I’m tring to integrate my RSS feed in a website using the MM_XSLTransform() function. I successfully tested several feeds from other wordpress blogs and other sources… all work fine except mine http://blog.euromango.com/?feed=rss or http://blog.euromango.com/?feed=rss2

I am getting the following error

MM_XSLTransform error.
Error opening http://blog.euromango.com/?feed=rss.

please help 🙂