How do I stop RadWindow Content Popping Out in Google Chrome

On My ASPX page i have a RadGrid that has a GridTemplateColumn. It displays an image thumbnail as an asp:HyperLink. (Code attached). I also have SWF and M4V files set up in the same way that have the same problem in Chrome; they dont show in the RadWindow and only give you the Save As dialog, which is exactly the opposite of what i am trying to achieve in terms of file security.

In Internet Explorer the RadWindow works fine but in Chrome it always pops out.
How can I stop the popout?
How can I hide the actual file now that I have made a path directly to it via the javascript?

<telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">  
<script type="text/javascript">            
function openRW_PNG(sender, args) {
var label = document.getElementById("<%= Label_PNG.ClientID %>").innerHTML;
var serverpath = "../../../App_Portal/xTrain/Images/VideoImages/"
radopen(serverpath + label, "RadWindow1");
}
</script>
    </telerik:RadCodeBlock>

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<telerik:GridTemplateColumn HeaderText="" SortExpression="XTV7_Categories_Image"
                        UniqueName="XTV7_Categories_Sub_Image">
                        <ItemTemplate>
                            <asp:HyperLink ID="btnImageDisplay" runat="server" Width="100px" Height="77px" CommandName="Select"
                                ImageUrl='<%# "~/App_Portal/xTrain/Images/VideoThumbs/" + Eval("XTV7_Videos_Image") %>'
                                ClientIDMode="Inherit" Target="RadWindow1" OnClick="openRW_PNG(); ">
                            </asp:HyperLink>
                        </ItemTemplate>
                    </telerik:GridTemplateColumn>

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