Why an embeded swf won't play on a page under https?

I have one swf banner which I want it into .aspx page. The website runs ok under http and the bann开发者_如何转开发er plays correctly. After we set the website to run under https, the banner stopped to load. I've tried to load this banner via http link from inside https running page. Nothing happened as well.

Example: Page: https://www.myswebsite.com.br/default.aspx

Script inside:

 <script src="http://www.mywebsite.com.br/AC_RunActiveContent.js" language="javascript"></script>   

    <noscript>
        <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" width="960" height="190" id="header" align="middle">
        <param name="allowScriptAccess" value="sameDomain" />
        <param name="allowFullScreen" value="false" />
        <param name="movie" value="header.swf" />
        <param name="quality" value="high" />
        <param name="bgcolor" value="#ffffff" />    
        <embed src="http://www.mywebsite.com.br/banner.swf" 
            quality="high" 
            bgcolor="#ffffff" 
            width="960" height="190" 
            name="header" 
            align="middle" 
            allowScriptAccess="sameDomain" 
            allowFullScreen="false"                 
            type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />
        </object>
    </noscript>

Use relative URLs for your script source and embedded flash file. Then they will requested via the same protocol (HTTP or HTTPS) as the hosting page.

<script src="AC_RunActiveContent.js" language="javascript" />
<embed src="banner.swf" ... />

embed Tag reference