Cant create curses's newwin() inside a class

Hi every1. I am writing a console progy here using curses libraries. What i have here is a certain class which has 2 pointers of type WINDOW. In my general constructor i am calling newwin() so that it creates the windows and sets my pointers. However i am getting segmentaion fault for some reason. Can anyone help? Here is the code snippet:

Code:

 
class Base
{
       private:
	    WINDOW  *window;
	    WINDOW  *win_temp;
       public:
	    Base(int nlines,int ncols,int begin_y, int begin_x);
};

Base::Base(int nlines,int ncols,int begin_y, int begin_x)
{
       window = newwin(nlines,ncols,begin_y,begin_x); 
 	
       if(window==NULL)
             cout<<"window is NULL!"<<endl;

       win_temp = newwin(nlines,ncols,begin_y,begin_x);  //24,35,10,42

       if(win_temp==NULL)
             cout<<"win_temp is NULL!"<<endl;

}

int main(void)
{
      initscr();  /*  ncurses mode  */
      cbreak();	
      refresh();
      Base MyObject(24,35,10,2);
      endwin(); /* terminate ncurses mode */
      return 0;
}

If you are thinking that i am passing bogus values to newwin(), then it is not it. It works with those values when windows are created in main()

just a guess.. but should initscr() (and/or the other ncurses functions that are currently in main) should they be inside Base's constructor where the window is created ?