Static call problems

Code:

---

class A
{
  std::map<std::string, Unit*> aMap;
    class B
    {
        void doSomething()
        {
              callA();
        }
    };

    void callA()
    {
        aMap.find()....
    }
};

---

this code snippet results in "A non-static member reference must be made relative to a specific object"
When I make callA() static, this error goes away, but there is problem with aMap.
Sorry, I can't translate the message because the IDE is in my language.
So please help me out.
Thanks
Jack

The problem is that class B hasn't got a clue which object A that is suppossed to receive the callA call. Pass that information to B when you create it.

S_M_A
I pass the object pointer to B, and it is working like a charm. Thanks a lot
Jack