I need help if any one can provide me with a solution

How can I make Lane Assistant option during navigation in my map work??
Although, I read that it comes as part of City Navigator .img file. I always update my maps City Navigators .img files and did not work.
For instance, I updated my map to this new release map of the MENA (Thanks to you guys) yet Lane Assistant does not work.
I have nuvi 1410 and I understands that it has the option to provide Lane Assistant

Please advise.