html5 - IIS 6.0 loses MIME type after I set it -

I am hosting some videos on version 6.0 on running version of IIS and I set my mime type correctly (.mp4, video / mp3), but when I try and stream those videos, it constantly tells me that mime types are not supported.

Since I am running IIS, I do not think I need to worry about .htaccess but I can be wrong.

Any idea how can I lose MIME information?

Set the MIME type directly to each individual site

[right click Please] Site-> Properties-> Html headers- & gt; Mime type

Hope it helps