Netwatch simple script not working RB2011

Hi

i am using RB2011L
i am using simple netwatch to monitor WAN connectivity, if WAN link gets down then i need to simply disable and then re-enable that WAN link.

On Down
/interface pppoe-client disable pppoe-out1
:delay 30
/interface pppoe-client enable pppoe-out1

Netwatch is able to detect status when WAN gets down, but the script dont disables the WAN as desired. I have been using same script on other RB and CCR models with success, but dont know why its not working here.

Any help??