Customizing ListForm using RenderingTemplates

Hello,

Please note that i developed a project on sharepoint 2010. I customized the listform by using SharePoint:RenderingTemplate 

I migrated my project to sharepoint 2013. I am facing a problem with Tasks list. 

When i attach a debugger, all lists except tasks are attaching to the custom Listfielditerator.aspx.cs

In Sharepoint 2010, the tasks list was working correctly with the custom listfielditerator. 

Please assist me in order to fix this issue in sharepoint 2013.

Thank you,

Patricia