Thank's Mihai. Now the problem of characters is ok.
now sometimes return a notice like this in the screenshot
(
http://www.notonlywork.com/sitemap-2.xml row 7, 13, 19, 25, 31 > tag value not valid)
and here
http://www.xenfra.com/sitemap-20.xml row 57>66
Tag principale: urlset
Tag: br (or b)