Problems trying to predict

i'm getting this:

Can't locate object method "predict" via package
"Algorithm::NaiveBayes::Model::
Frequency" at
/usr/lib/perl5/site_perl/5.8.0/AI/Categorizer/Learner/NaiveBayes.p
m line 28.

when trying to get hypoteses.. for a new doc....

anyone know if this is a silly one?

Thanks in advance

Saludos, Ignacio J. Ortega
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