Apache to serve .asp files as html mime type

I need to be able to serve .asp files (containing HTML) as html pages. With the default apache config of my local machine it doesn’t even require tweaking, but with the dreamhost shared hosting config it uses text/plain as mime I believe (since it prints the HTML to my browser). What could be the issue here?

I’ve tried to add the following options to .htaccess without luck:
AddType text/html asp
DefaultType text/html

Many thanks for any hints!