L30ER Redundancy and crossload issue

Hello every one !!! how to establish cross load for L3OER. I configure 1 topic for primary,2 for secondary, and alias topic 3 which include both topic 1 & 2.but at a time any 1 topic is lock.whenever i off 1 PLC topic automatically switch over to 1 to 2 and a vice-versa,Both topics are not locked together. So i think crossload is not establish.

Here i also attached configuration page

please give me solution if any on my id [email protected] or here

Thanks
Anand