Re: Problem overloading extraction operator

Working on Visual Studio .Net I've implemented a class:

#ifndef CONTRIBUTOR_H
#define CONTRIBUTOR_H

enum Gender {male=1, female, unk};

#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

class Contributor
{
    friend ostream& operator << (ostream& output, Contributor& RHS);
    friend istream& operator >> (istream& input, Contributor& RHS);

public:
    Contributor();
    Contributor(string Name, double Contribution, Gender MF, int IDKey);
    Contributor(const Contributor &copy);
    Contributor& operator=(const Contributor& RHS);
    bool operator== (const Contributor& RHS);
    ~Contributor() {cout << "In Contributor Destructor" << endl;}

private:
    std::string Name;
    double Contribution;
    Gender MF;
    int IDKey;
};

Then I tried to overload the extraction operator thus:

istream& operator >> (istream& input, Contributor& RHS)
{
    cout << "\nEnter a new contributor's name: ";
    std::getline (cin, RHS.Name);
    cout << "Enter the amount of their contribution: ";
    cin >> RHS.Contribution;
    cout << "What is the gender of the contributor? ";
    cin >> RHS.MF;

     cout << "Assign an ID Key to the contributor: ";
    cin >> RHS.IDKey;

    return input;
}

But I keep getting this error: error C2679: binary '>>' : no operator
found which takes a right-hand operand of type 'Gender' (or there is
no acceptable conversion)

I've got gender defined in my constructors as well as the overloading
implementation. I don't understand why I'm getting this error. Can
someone help?