htaccess file for audio mime types

Hello, Im having trouble getting playlists to work on my site. Ive updated the mime types in the server settings & still with no joy. My playlists still keep opening as plain text files instead of loading up the corresponding audio software on the visitors pc.

I put a .htaccess file on my server to try & make it work this way, but when the file is there my website wont load up at all.

This is the text in my htaccess file...

AddType video/x-ms-asf
AddType audio/x-Mpegurl
AddType audio/x-scpls
AddType audio/x-pn-realaudio
AddType video/quicktime

Does anyone know why this may be happening?
Thanks

Are you sure the file names are correct? How did you create the playlists? Are you sure there is no .txt extension on there somewhere? Do you have a link to your site or one of your playlists?

Its also possible your php installation is running as a module in which case I don't think htaccess will work properly.