Deploy War on Amazon EC2

When I deploy my Grails application using RDS, I get this error:

Caused by: 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 java.lang.NullPointerException