ssrs 2012 with reportviewer v 10

Found the solution.

Inside the rld (code view) Had to set <page><InteractiveHeight=0in>.  This forces it to stay on one page.

Then in the aspx page for the reportviewer control I had to set the following..
SizeToReportContent="false" AsyncRendering="true".  I also had the cssclass="fullheight" on the ReportViewer.


As soon as I set SizeToReoprtContent="false" my scrollbar appeared again to keep the headers locked.  

The following is also in the head section of the page.

<style type="text/css">  
     .fullheight{margin-bottom:60px;}
</style>
<script language="JavaScript" type="text/JavaScript">
        window.onload = function resize() {
           var viewer = document.getElementById("<%=ReportViewer1.ClientID %>");
           var docheight = document.body.clientHeight;
           if (viewer != null) {
                viewer.style.height = (docheight - 70) + "px";
           }
         }
</script>