[Pellet-users] help please

[Giantonio Chiarelli]

I make a simple protégé project in wich there are Person, Colors, Black
hair and blond hair;

Person has a ObjectProperty "haCapelli" (hasHair), from Person to Colors;

Colors has more individuals: Nero (black), Marrone (brown) e Giallo
(Yellow);

Person has more individuals:
Mari has brown hair
Giantonio has black hair
Giacomo has yellow hair

Rules are (made by Protégé SWRL tab):
bruno(X) :- Persona(X), haCapelli(X, Y), Colore(Y), Y = 'nero';
biondo(X) :- Persona(X), not bruno(X)

than

bruno(Giantonio)
biondo(Mari)
biondo(Giacomo)

But Pellet exaplain some warning because for negation I use the built-in
function 'http://www.w3.org/2003/11/swrlb#notEqual'...
What is wrong? Or how can I use Pellet to make this inference?
I send you the ontology (prova.rar) and the warning message report...

WARN [main] (BindingGeneratorStrategyImpl.java:94) - IGNORING RULE 
[http://localhost:8080/clickworld2/ontologie/ontology.owl#Persona(?http://localhos
t:8080/clickworld2/ontologie/ontology.owl#x), 
http://www.w3.org/2003/11/swrlb#notEqual([?http://localhost:8080/clickworld2/ontologie/ontology.owl#Brun
o])] => 
[http://localhost:8080/clickworld2/ontologie/ontology.owl#Biondo(?http://localhost:8080/clickworld2/ontologie/ontology.owl#x)]: 
Cannot generat
e bindings for all data variables.

Thanks
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