Important Problems with feed rss ???????

Hello, yesterday I installed wordpress 2.2, all the installation process was ok BUT when I was seeing my blog i saw that the feed rss have an error because insteat of this: https://wotevaruwont.wordpress.com/feed ( this is a normal feed rss) my feed’s blog have this appearance: https://wotevar.es/?feed=rss2.

After this I delete this wp and I installed the wordpress 2.0.5 and I have another time the same problem. And when I put my blog direction in feedburner, it tell me that this feed is incorrect.

What should i do???

Sorry of my english I’m spanish but in spanish there are few forums about wp