Tig_MyParcel

1. Open app/design/frontend/base/default/template/myparcel/pakjegemak.phtml and find the following lines:

   if(undefined === formulier)
   {
       // onestepcheckout
       formulier = parent.parent.window.opener.document.forms['onestepcheckout-form'];
   }
   

2. Replce them with

   if(undefined === formulier)
   {
       // onestepcheckout
       formulier = parent.parent.window.opener.document.forms['onestepcheckout-form'];
   }
   
   if(undefined === formulier)
   {
       // firecheckout
       formulier = parent.parent.window.opener.document.forms['firecheckout-form'];
   }
   

3. Save the file and clear cache