Service in Grails-Klasse nutzen

[ingobulla]

Hallo,

ich habe in einem Grails-Projekt eine Klasse

class ScoringJob {
	int stamp
	int seed
	double score
	JobStatus status

	IdService idService

	...
}

in der ich einen Service IdService nutzen will. Obwohl die Zeile

IdService idService

in einem Controller problemlos läuft, bekomme ich bzgl. obigen Code die Meldung

2009-01-30 11:22:27.449::WARN:  Nested in org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'messageSource': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Invocation of init method failed; nested exception is org.hibernate.MappingException: An association from the table scoring_job refers to an unmapped class: IdService:
org.hibernate.MappingException: An association from the table scoring_job refers to an unmapped class: IdService

Oder kurz: IdService wird nicht gefunden.

Weiss jemand, was hier los ist?