asp.net - Silverlight call from aspx no longer working -

i'm fixing old code uses silverlight along arcgis. silverlight portion broke on time. code that's used is:

<asp:silverlight id="xamlmain" runat="server" source="clientbin/controlpoints.xap" minimumversion="3.0.40624.0" width="100%" height="100%" /> 

and way called

function refreshcontrolpointlayer() {     var slcontrol = document.getelementbyid("xamlmain");     slcontrol.content.refreshcontrolpointslayer();     } 

i "slcontrol.control undefined." after looking silverlight call (i have no prior experience or knowledge of silverlight) found way it's being called old, changed new object way.

<object type="application/x-silverlight-2" data="data:application/x-silverlight," width="100%" height="100%">                     <param name="source" value="clientbin/controlpoints.xap" />                     <param name="id" value="xamlmain" />                     <param name="runat" value="server" />                     <param name="onerror" value="onsilivererror" />                     <param name="background" value="white" />                     <param name="minruntimeversion" value="3.0.40624.0" />                     <param name="autoupgrade" value="true" />                     <a href="http://go.microsoft.com/fwlink/?linkid=149156&v=4.0.60310.0" style="text-decoration:none">                      <img src="http://go.microsoft.com/fwlink/?linkid=161376" alt="get microsoft silverlight" style="border-style:none"/>                     </a>                 </object><iframe id="_sl_historyframe" style='visibility: hidden; height: 0px; width: 0px; border: 0px'></iframe> 

and call calling function "refreshcontrolpointslayer()." in chrome's inspector console i'm able see code

function refreshcontrolpointslayer() {           window.opener.refreshcontrolpointlayer();     return false; } 

but in firebug can is

<td align="center"> <span id="ctl00_main_gv_import_ctl21_importstatus" disabled="disabled"      style="color:red;"></span> </td><td>10x</td><td>5570.47000</td><td>1244.33900</td><td>473.69900</td><td>brk-10x bk 25596 pg ?? </td><td>&nbsp;</td> </tr> 

the function refreshcontrolpointslayer() doesn't show in firebug. both tell me "window.opener.refreshcontrolpointslayer not function." i've opened xap file contained dll's.

am calling silverlight object wrong? has ever had similar happen them? 1 off top of there head know how should call xap file aspx page can use it's functions? thank help.