$find cannot find radajaxmanager

[tony]

there are numerous but unhelpful threads about $find() failing to find radajaxmanager, a problem i am currently encountering after several weeks of successful operation. what must be true in order for $find() to find radajaxmanager???

i have a page with an ajaxcontrols toolkit tab. the first tab contains a grid whose rows can be selected (only 1 at a time). above the tab control is a radajaxmanager. the client onrowselected event is as follows:

    <script type="text/javascript" id="telerikClientEvents1">
//<![CDATA[
    function SaleEventsRadGrid_OnRowSelected(sender,args)
    {
 //find and set some other controls. then do the following to rebind a grid on another tab:
        $find("<=RadAjaxManager1.ClientID%>").ajaxRequest();
    }
//]]>
</script>

Error: Unable to get value of the property 'ajaxRequest': object is null or undefined

why can't $find() find radajaxmanager even though it can find any other control i wish to find? the aspx page uses a master page containing radscriptmanager.

[tony]

i can chalk up another several hours to carelessness and javascript's retrograde uselessness - somehow a % sign went missing in action.....

[Allen]

Thank you.  You are not alone in this travail.