spring 3.0 aop Pointcut is not well-formed: expecting 'name pattern' error

The following is my pointcut and advise declaration

//PointCut on A method which takes two parameters and is in a DAO
@Pointcut("execution(backend.repository.QuestionsRepository.AnswerQuestion (..))")
public void answerQuestionPointCut() {}


@Around(
   value="web.activity.advisors.UserActivityAdvisor.answerQuestionPointCut()",
   argNames="question,answer"
)

 // Do something

}

I get the following error

Initialization of bean failed; nested exception is java.lang.IllegalArgumentException: Pointcut is not well-formed: expecting 'name pattern' at character position 65
execution(backend.repository.QuestionsRepository.AnswerQuestion (..))
                                                                 ^

Am stuck on this, Any pointers