Caching problems for iframes by Forever_newbie

I have a asp.net web page with iframes that are generated by the youtube api. Youtube has a method shown here:
function onYouTubeIframeAPIReady() {
        refreshneeded = true;
            player = new YT.Player('player', {
                height: '<%=Session("PlayerHeight")%>',
                width: '<%=Session("PlayerWidth")%>',
                videoId: '<%=session("uTubeCode") %>',
                wmode: 'transparent',
                playerVars: { 'controls': 1, 'fs': 1, 'autoplay': 1, 'autohide': 0, 'modestbranding': 1, 'rel': 0, 'showinfo': 0},
                events: {
                    'onReady': onPlayerReady,
                    'onStateChange': onPlayerStateChange
                }
            });
Notice how it uses session variables from my code-behind page. The problem is, that running the program from visual studio, the video usually doesn't appear unless I do a REFRESH. It will appear (with no need for a refresh) if I clear the cache first. I do not want to spend $259 working with a Microsoft engineer on this, which would be the best way to go, and my boss might object to my giving away source code. I can't make a simple sample page to show you, and I can't get it to be 100% repeatable. I did try setting caching to 'nocache' in the code-behind page - that did no good.