[rules-users] Could not load property

Hi I am made an application in struts,write some rules in drl file. deployed it with BRMS. now I am trying it with rule agent with rule.properties file or using drl file directly by setting path in classpath. but always find following error 11:56:31,696 ERROR [STDERR] java.lang.NullPointerException 11:56:31,696 ERROR [STDERR] at java.io.Reader.<init>(Reader.java:61) 11:56:31,696 ERROR [STDERR] at java.io.InputStreamReader.<init>( InputStreamReader.java:55) 11:56:31,696 ERROR [STDERR] at com.cstregistration.DroolsTest.readRule( DroolsTest.java:42) 11:56:31,712 ERROR [STDERR] at com.cstregistration.DroolsTest.callrule( DroolsTest.java:21) 11:56:31,712 ERROR [STDERR] at com.cstregistration.A1RegistrationAction.execute(A1RegistrationAction.java :61) 11:56:31,712 ERROR [STDERR] at org.apache.struts.chain.commands.servlet.ExecuteAction.execute( ExecuteAction.jav a:58) Please tell me where is problem, Why properties file or drl file is not found ? Thanks in advance Rahul upadhyay