[rules-users] error

[fakhfakh ismail]

Hello,
when I EXECUTE my Rule an exception is affiched:

org.drools.rule.InvalidRulePackage: Unable to create Field Extractor for 'lproject'
Rule Compilation error $lproject cannot be resolved

MYrules:
rule "userrole1"
when
 $Project : Project($name : name,$lproject : lproject)

then

$lproject.deleteRole("Buyer");

end

et mon Java Bean:
public class Project {
      private String Name ;
      private ProjectSession lproject;
      public Project(String Name, ProjectSession lproject)
      {
          setProject(Name);
          setlProject(lproject);
      }
      
      public void setProject(String Name)
      {
          this.Name=Name;
      }
     public String getName()
     {
         return this.Name;
     }
     
      public void setlProject(ProjectSession lproject)
      {
          this.lproject=lproject;
      }
     public ProjectSession getlProject()
     {
         return this.lproject;
     }   
}

Please help me
Best regards
Ismail

 		
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