I am not able to put the panel inside the wxMDIParentFrame

Hi,
    I am not able to put the panel inside the wxMDIParentFrame..If want to put, what i have to do...pls see the below code and give me the solution

from wxPython.wx import *
from wxScrolledWindow import MyCanvas

class MyParentFrame(wxWi,wxPanel):
    def __init__(self):
        par = wxFrame.__init__(self, None, -1, "MDI Parent", size=(600,400),
                                  style = wxDEFAULT_FRAME_STYLE )

        self.winCount = 0
        menu = wxMenu()
        menu.Append(5000, "&New Window")
        menu.AppendSeparator()
        menu.Append(5001, "E&xit")

        menubar = wxMenuBar()
        menubar.Append(menu, "&File")
        self.SetMenuBar(menubar)

        self.CreateStatusBar()

        pan = MyPanel(self,self)

class MyPanel(wxPanel):
    def __init__(self, parent, log):
        wxPanel.__init__(self, parent, -1)

Thanks & Regards
Bala