The wi-fi switch is not active?

Roaming setup the two routers have to be connected by ethernet.. and the second router has to create a wireless network.. if you have it setup in extend wireless it won't work.. if you have join wireless it won't work.

Give a screenshot of the issue.

But the easiest way to fix it is hard reset on the second router.. and start the setup over manually. Put the router in bridge. ie on the network tab it has to be off bridge mode.. and then the wireless will have create a wireless network..

I do not have enough information to go further than that.. give a few screenshots of the problem and we can help you fix it.