Hello.
What is your configuration? What is the status after the reboot? Is the route missing from the routing table? Is it missing from the configuration?
This is the config I normally use which works fine
ip sla monitor 200
type echo protocol ipIcmpEcho 192.168.1.1
timeout 500
frequency 3
ip sla monitor schedule 200 life forever start-time now
!
track 13 rtr 200 reachability
Simon