I'm attaching a file to an http response using this header:

```
Content-Disposition: attachment; filename="example.doc"

```

It works perfectly unless I try to download the file over HTTPS using Internet Explorer.
IE ignores the Content-Disposition header and just tries to download the server-side script file (classic ASP) and fails.

I've tried all kinds of variations of headers (mostly cache-related) with no success at all.

How can I get IE to recognize the attached file?

**Edit:** The download request is sent by setting the *src* attribute of an iframe. Downloads work perfectly when not using an iframe.

**Edit 2:** When the download confirmation dialog appears I can click *Open* to open the file in IE, but saving the file doesn't work. The error:

> 
> Unable to download download.asp from *server.com*.
> 
> 
> Unable to open this Internet site. The requested site is either unavailable or cannot be found. Please try again later.
> 
> 
>