STL set with custom data type

Hi,

I have structure representing a 2 dimesional point:

struct K2dCoords
{
    K2dCoords(void):m_x(0), m_y(0){};
    K2dCoords(double x, double y):m_x(x), m_y(y){};
    K2dCoords(const K2dCoords& rhs): m_x(rhs.m_x), m_y(rhs.m_y){};
    double getX() const {return m_x;}
    double getY() const {return m_y;}
    double m_x;
    double m_y;
};

I want to store pointers to instances of this in a STL set.
So I define the sorting criterion, such that two points are considered
equal
if the distance between them is negligeble (less than a tolerance):

struct eq
{
    bool operator() (const K2dCoords* p1, const K2dCoords* p2) const
    {
        const double tol = 0.25 / 1E3;
        return sqrt((p1->getX() - p2->getX()) * (p1->getX() - p2->getX
()) + (p1->getY() - p2->getY()) * (p1->getY() - p2->getY())) > tol;
    }
};

The problem is that after I've inserted some point in my set, I cannot
find them:

    // some initialisation data
    const double inc = 0.25;
    const double deckLength = 1.0;
    const double deckWidth = 0.48;
    double x = 0;
    double y = 0;
    const double PI = 3.1415926;
    std::set<K2dCoords*, eq> stlMap;

    // create some points and add them to my set
    while (x <= deckLength)
    {
        while (y <= deckWidth)
        {
            const double xSp = x * cos(30.0 * PI / 180.0) - y * sin
(30.0 * PI / 180.0);
            const double ySp = x * sin(30.0 * PI / 180.0) + y * cos
(30.0 * PI / 180.0);
            stlMap.insert(new K2dCoords(xSp, ySp));
            y += inc;
        }
        x += inc;
        y = 0;
    }

    // check if I've got them; the test point are created in the same
way as they were created for insertion
    x = 0;
    y = 0;
    while (x <= deckLength)
    {
        while (y <= deckWidth)
        {
            const double xSp = x * cos(30.0 * PI / 180.0) - y * sin
(30.0 * PI / 180.0);
            const double ySp = x * sin(30.0 * PI / 180.0) + y * cos
(30.0 * PI / 180.0);
            std::set<K2dCoords*, eq>::iterator it = stlMap.find(new
K2dCoords(xSp, ySp));
            if (it == stlMap.end())
            {
                ASSERT(FALSE); // suerly this should not assert, but
it does (when x=0.25 and y=0)!!!
            }
            y += inc;
        }
        x += inc;
        y = 0;
    }

What am I doing wrong? Thanks.