error when analyse overload functions

[tedsun]

when I analyse a file with some overload functions, the doxygen can only get the function call tree of the first one. Do any other had encountered this problem?
This is my file:

#include <iostream>
using namespace std;
void print(int i);
void print(string str);
int main()
{
    print(12);
    print("hello world!");
    return 0;
}
void print(string str)
{
    cout << "print a string:" << i << endl;
}
void print(int i)
{
    cout << "print a integar:" << i << endl;
}

when I analyse this file, I can only get main->print(int i)   and can not  get main->print(string str)