Pattern Match Labelling not working...

I have defined a pattern on the default job of a plan to be

.*(\w+)\-(\w+).\.+.SUCCESS.* 

and then i chose the label to be \1 as defined by this doc

https://confluence.atlassian.com/display/BAMBOO/Configuring+automatic+labelling+of+job+build+results

The plan does not get labeled even though there are two lines that satisfy this in the build log. Please advise me on how to use this option. Thanks.

build	01-Jul-2013 16:18:51	[INFO] child-one ......................................... SUCCESS [2.124s]
build	01-Jul-2013 16:18:51	[INFO] child-two ......................................... SUCCESS [0.930s]