RSS showing up blank

Hi guys,

I recently my updated wordpress blog from v2.0.1 to 2.0.6, but now my feed stopped working. I get a totally blank page. Also the page-source is not showing anything.

I tryed looking for a sollution on this forum, but it is not working for me. I saw some posts about a feedburner, didn’t know what it was, but i tryed it, and it gave me this error:

“The URL you entered does not appear to be a valid feed. We encountered the following problem: Error on line 20: The entity name must immediately follow the ‘&’ in the entity reference.”

I think it is something in the code? Can someone help me out with the code? Or is it something else i do wrong?

This is the URL to my feed: http://www.vmx.nl/?feed=atom

Please help me out here!