XML Parsing error..

Everything runs fine, but when I go to my sitemap;

I get this in browser:

XML Parsing Error: not well-formed
Location: http://legacygamers.net/sitemap_index.xml.gz
Line Number 1, Column 1:�

sitemap location is there.

any idea?

also google webmaster tools said that the .html I uploaded that it told me to, isn't found, when I can browse to it perfectly fine. But when I remove htaccess it verifies correctly.

your site doesn't appear to be accessible. i get a white page on everything.

I am also getting white pages everywhere.

Hi There
i have this error in sitemap 1 also:

12007Parsing error
We were unable to read your Sitemap. It may contain an entry we are unable to recognize. Please validate your Sitemap before resubmitting.

i opened the sitemap and saw this:
The following tags were not closed: urlset

and this is not closed: <priority>0.8</priority