multiple radius servers

Can I (or how would I) have the Mikrotik Hotspot system query two radius boxes.
I have set up 2 radius servers in the Mikrotik Winbox but they do not failover.

If you want a failover, then enter the second RADIUS server info just like the first. Insure it is second in the list. If the first RADIUS server does not respond, it will query the second server. If the first server responds with “Access-Reject”, then the second server will not be queried.