Custom Sensor LimitMaxWarning not enabled?

Trying to set and enable limits on a channel of a custom sensor. Here's my output:

<result> <Channel>Packet Loss</Channel> <Unit>Percent</Unit> <Value>$loss</Value> <ShowChart>0</ShowChart> <LimitMaxWarning>25</LimitMaxWarning> <LimitMaxError>50</LimitMaxError> <LimitMode>1</LimitMode> <!-- I've tried 0 or 1 here --> </result>

It's adding the 25/50 #'s into the channel but not enabling limits. How is that done? I understand this is only read on the first sensor scan.

Thanks! -Andrew

custom-exe custom-sensor limits