Call overridden methods with call_user_function_ex()

Hi, I have written an simple extension module with two classes. Class A implements the Method dosomething(). Class B is derived from Class A and overrides the method dosomething(). Now I want the overridden method in Class B to call the original method from Class A. How can I do this with call_user_function_ex()? This is easy for constructors, because the constructor of class B has a different name then the constructor of class A, but if I try this with a normal method I have to specify WHICH incarnation of the method should be called or otherwise I get a loop. How can I do this? -- Bye, K <http://www.ailis.de/~k/> [A735 47EC D87B 1F15 C1E9 53D3 AA03 6173 A723 E391] (Finger k@ailis.de to get public key)