[Typo3] XML problem

[Claus Lavdal]

Dear list.

Im trying to make an rss feed for tt_news.

I have set the config.additionalHeaders = Content-type:text/xml

But it keeps setting the header to text/html.

my ts setup http://lavdal.dk/index.php?id=59 (Typo3 v. 3.8.0 and tt_news 
2.2.24 )
my rss feed: http://lavdal.dk/index.php?id=54 or whit real url: 
http://lavdal.dk/rss_feed.54.0.html

can anyone guide me to a solution.

Claus Lavdal