.grid problem is freezing my GUI

[360monkey]

With some tinkering with previous answers for previous questions, I have come across a new problem with my GUI. I cannot align with the grid (?)

example:

from Tkinter import *
import random

class App:
	
	def __init__(self, master):
		frame = Frame(master)
		frame.pack()
		self.label = LabelFrame(frame, text='Battler III')
		self.label.pack()
		self.areBtn = Button(frame, text='Arena Mode', relief=RAISED, command=self.arena)
		self.areBtn.grid(row=4)
		self.areBtn.pack()
		self.advBtn = Button(frame,text='Adventure Mode', relief=RAISED, command=self.adventure)
		self.advBtn.grid(row=6)
		self.advBtn.pack()
		
	def arena(self):
		top = Toplevel()
		self.label = Label(top, text='Battler III').pack()
		self.pone = Label(top, text='Player One:').grid(row=0)
		self.ptwo = Label(top, text='Player Two:').grid(row=1)
		self.e1 = Entry(top).grid(row=0, column=1)
		self.e2 = Entry(top).grid(row=1, column=1)

root = Tk()		
app = App(None)
root.mainloop()

when i run this (in Python 2.6.4), it will freeze my Tk window and not open a toplevel window. I have to exit the console, to restore order.

Help would be appreciated!
>.<

[bvdet]

You cannot mix geometry managers! Mixing pack with grid will create an endless loop.