STL map with key as a structure compare function issue

hi am facin a small problm,tried solving it, but my soln doesn't work.
cud u help me out.?

I need to maintain a map of <unsigned int[2], vector<int>>

here's wht i did - defined a class for storing the unsigned int [2] &
defined the corrspndng
compare function, the problem is that inspite of filling in the map
correctly, the find() returns an end - seems like the comparision
function's incorrect - but I can't seem to use a
workarnd.

If nothng works then I'd have to use a double as a key - but is there a
way out? I searched the net - but cudn't find an approp answer.

thanks a bunch!
here's the code

#include <map>
#include<string>
#include<vector>
# include<iostream.h>
using namespace std;

class Keysq
{
    public :
        bool operator() (const Keysq &a, const Keysq &b) const
        {
            return a.key[0] < b.key[0];
        }
        unsigned int key[2];
        /*ostream& operator<< (ostream& os, const Keysq& s)
        {
            return os<<s.key[1];
        }*/

};

typedef vector <int> df;

typedef map<Keysq,df,Keysq >assocMap;
assocMap::iterator itr;
main()
{
   Keysq k,a;
   k.key[0] = 10; k.key[1] = 20;
   a.key[0] = 123; a.key[1] = 32;

    df d;
    d.push_back(1);
    d.push_back(2);
    d.push_back(3);

    assocMap s ;
    s[k] = d;
    d.clear();
    d.push_back(4);
    d.push_back(5);
    d.push_back(6);

    s[a] = d;
    itr = s.find(k);
    cout << (itr == s.end())<<endl; // return a true!! l
}