Return to product details page from custom page

[fross]

Hello,

I've created custom page in provisioning module and added link to this page in ClientAreaCustomButtonArray. But when I going to this page, I shouldn't return to product details page. The last link in breadcrumb looks like "href="/clientarea.php?action=productdetails#" as this link is incorrectable I am taken to wrong page "clientarea.php?action=products". In the sidebar, in "service detail overview" tab, "Information" link looks like "href="/clientarea.php?action=productdetails&id=6774#tabOverview" and I stay on current page.

CustomPage function:

function myModule_myCustomPage() {
    return array(
        'templatefile' => 'templates/datatraffic',
        'breadcrumb' => array( "clientarea.php?action=productdetails&id={$params['serviceid']}$modop=custom&a=myCustomPage" => "CustomPage"),
    );
}

Also I've added the "breadcrumb" to array in ClientArea, but I guess that it does not work.
 

function myModule_ClientArea($params) {
	...
	return array(
		'templatefile' => 'templates/clientarea',
        'breadcrumb' => array("clientarea.php?action=productdetails&id={$params['serviceid']}",
		...
        ),
	);
}

Can you help me, please?