Trouble in accessing items in RArray???

i have a piece of code below:

CMyClass.h
class CMyClass: public CBase
{
enum TListenerType
{
EListener1,
EListener2
};

typedef RArray< TAny* > TListenerList;

typdedef RArray< TListenerList > TListenerHandler;

TListenerHandler iHandlers;
public:
TListenerList& ListenerHandler(TListenerType aType);
};

CMyClass.cpp
......................
CMyClass::TListenerList& CMyClass::ListenerHandler(TListenerType aType)
{
return iHandlers[aType];/// USER 130
}
......................

when i set aType = EListener1 or aType = EListener2, it raises USER 130
means that the index of iHandlers is out of bound.

Can someone explain why?

ht_it
Regard,