wx.grid problem

[BH]

Hi !

I have a small problem with wx.Grid and scrollbars.
Scrollbars definitively dissapears after resizing the frame.

Thx for help

#----------------------------------------------------------------------
import wx,wx.grid
#----------------------------------------------------------------------
class MainWindow(wx.Frame):
      def __init__(self,parent,id,title):
          wx.Frame.__init__(self,parent,wx.ID_ANY,title)
          #--
          self.grid= wx.grid.Grid(id=wx.ID_ANY,parent=self)
          self.grid.CreateGrid(numRows=10,numCols=2)
          self.grid.Fit()
          self.Fit()
          #--
          self.Show(1)
#----------------------------------------------------------------------
app = wx.PySimpleApp()
frame=MainWindow(None,-1,'Grid sizer')
app.MainLoop()
del app