Why server complaining about aspectOf is missing?

I am currently trying to inject Spring bean in AspectJ like the code shown below, anyhow I the server (WAS Liberty Profile) keep complaining the method aspectOf is missing. May I know how could I solve this problem?

application-context.xml

<aop:aspectj-autoproxy/>
<import resource="/context-file-A.xml"/>

context-file-A.xml

<bean id="loggingAspect" class="com.huahsin.LoggingAspect" factory-method="aspectOf">

JAVA code

@Aspect
public class LoggingAspect {
   ...
}