[rules-users] Drools fusion and absence of events

Hi, Trying to get to grips with Fusion and absence of events... If I have a Bean that has just a simple variable, e.g. class MyBean { private String name; getter+setter } I want to use events to determine when an object with name=="one" is available, and no object with name=="two" appears within 10 seconds.. So, I write a rule: declare MyBean @role( event) end rule "myrule' when $a : MyBean(name=="one"); not( MyBean(name=="two", this after [0s,10s] $a)) then //do something end If I inject an object with Name="one", and then wait 10seconds, I get the 'myrule' fired, great! But, if i inject an object with name="one" and then 1second later I inject an object with name="other" the 'myrule' is fired.. Looking at the manual, this seems kind of correct, the rule says if I have a "one" and not a bean with name=="two" which I do, as I have a 'one' and a 'other' But, how do I write the rule to say, I have a 'one' and 'two' doesn't turn up? Cheers Ric