[Pacemaker] how to let pacemaker promote a slave to master in the latest version 1.1.5?!!!

[项磊]

 in the old versions, if simplely writing location constraints like:    <rsc_location id="loc-1" rsc="Webserver" node="sles-1" score="1"/>    <rsc_location id="loc-2" rsc="Webserver" node="sles-2" score="1"/>one of the Webserver(a master/slave resource) instantce will be promoted.but in the latest version 1.1.5, it seems not work, both instances are in slave and never change its state.who can tell me what to do?thank you !!! 		 	   		  
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