[rules-users] constraints and shadow facts

Hello, I am using drools 4.0.7 with eclipse 3.3 plugin, and JVM 1.6.0_04-b12 I am a drools beginner and I first try to implement basics rules. I have faced a very strange behaviour I don't understand. Below the use case & rules : ---------------------------------------- Rules ---------------------------------------- package poc import poc.FlashFact; *rule "always"* when $f : FlashFact() then System.out.println("*** always ... "+$f); end *rule "one (eval)"* when $f : FlashFact() eval($f.getHomepage().equals("one")) then System.out.println("*** one (eval) ... "+$f); end *rule "one (==)"* when $f : FlashFact(homepage == "one") then System.out.println("*** one (==) ... "+$f); end ---------------------------------------- Use Cases ---------------------------------------- I insert 2 FlashFact instances (one with homepage == "one", another with "dummy") when I lauch the rules (without shadows proxy), the output is : *** one (eval) ... poc.FlashFact[one] *** always ... poc.FlashFact[one] *** always ... poc.FlashFact[dummy] /*=> I don't understand why rule one(==) is not fired ?*/ when I lauch the rules (with shadow proxy), the output is : *** one (==) ... poc.FlashFact[one] *** one (eval) ... poc.FlashFact[one] *** always ... poc.FlashFact[one] *** always ... poc.FlashFact[dummy] The == and eval does not behave the same way with/without shadow proxy. Moreover, I have run the State example provided with Drools in my workspace and it worked fine (== without shadow proxy). Can someone has a deep understanding of this difference of behaviour ? Thanks for your reply.