cant return to run camera!

[asteroidm]

[CODE]# Copyright (c) 2006 Jurgen Scheible
# this script lets you create a simple application menu

# NOTE:
# press the options key in order to open the applicaion menu
# when running the script!


import appuifw
from appuifw import *
import camera
from graphics import *
from camera import *
import e32
import audio
from key_codes import *
import ftplib
global picselection
global picselection1
global picselection2
global running
global Image

def exit_key_handler():
app_lock.signal()



def item0():
class Keyboard(object):
def __init__(self,onevent=lambda:None):
self._keyboard_state={}
self._downs={}
self._onevent=onevent
def handle_event(self,event):
if event['type'] == appuifw.EEventKeyDown:
code=event['scancode']
if not self.is_down(code):
self._downs[code]=self._downs.get(code,0)+1
self._keyboard_state

=1
			elif event['type'] == appuifw.EEventKeyUp:
				self._keyboard_state[event['scancode']]=0
			self._onevent()
		def is_down(self,scancode):
			return self._keyboard_state.get(scancode,0)
		def pressed(self,scancode):
			if self._downs.get(scancode,0):
				self._downs[scancode]-=1
				return True
			return False
	keyboard=Keyboard()
	running=1
	switch = 1
	appuifw.app.screen='normal'
	img=Image.new((176,208))


	def quit():
		running=0
		appuifw.app.set_exit()


	def handle_redraw(rect):
		canvas.blit(img)


	canvas=appuifw.Canvas(event_callback=keyboard.handle_event, redraw_callback=handle_redraw)
	appuifw.app.body=canvas

	app.exit_key_handler=quit

	screen_picture = camera.take_photo(size = (160,120))



	while running:

		if switch == 1:
			screen_picture = camera.take_photo(size = (160,120))

		img.blit(screen_picture,target=(8,10,168,130),scale=1)

		handle_redraw(())
		e32.ao_yield()

		if keyboard.pressed(EScancodeLeftSoftkey):
			switch = 1
    
		if keyboard.pressed(EScancodeSelect):
			switch = 2
			e32.ao_yield()
			image = camera.take_photo(size = (640,480))
			filename=u'c:\\picture.jpg'
			image.save(filename)
			screen_picture =Image.open(u'c:\\picture.jpg')
			e32.ao_yield()



        

def item1():
	filename = 'c:\\boo.wav'

# define the recording part:
	def recording():
		global S
		# open the sound file to be ready for recording and set an instance (S) of it
		S=audio.Sound.open(filename)
		# do the recording (has to be stopped by closing() function below)
		S.record()
		print "Recording on! To end it, select stop from menu!"
		# define the playing part:
	def playing():
		global S
		try:
		    # open the sound file to be ready for playing by setting an instance (S) of it
			S=audio.Sound.open(filename)
		# play the sound file
			S.play()
			print "Playing"
		except:
			print "Record first a sound!"

# stopping of recording / playing and closing of the sound file
	def closing():
		global S
		S.stop()
		S.close()
		print "Stopped"


	def exit_key_handler():
		script_lock.signal()
		appuifw.app.set_exit()

	script_lock = e32.Ao_lock()

	appuifw.app.title = u"Sound recorder"

	# define the application menu
	appuifw.app.menu = [(u"play", playing),
		                (u"record", recording),
			            (u"stop", closing),
						(u"camera", item0)]

	appuifw.app.exit_key_handler = exit_key_handler
	script_lock.wait()
 


def item2():
 	def __exit__():
		APP_LOCK.signal()
 
	def doSave():
		try:
			f = open( 'c:\\yourFile.txt', 'wb' )
			yourText = appuifw.app.body.get()
			f.write( yourText.encode("utf-8") )
			f.close
			appuifw.note( u'Saved :)', 'conf' )
        
		except IOError, e:
			appuifw.note( u'Wrong file path!', 'error' )
 
		except UnicodeError, e:
			appuifw.note( unicode( e ), 'error' )
 
 
	if __name__ == "__main__":
		APP_LOCK = e32.Ao_lock()
		appuifw.app.title = u'Text to file'
		appuifw.app.exit_key_handler = __exit__
		appuifw.app.body = appuifw.Text()
		appuifw.app.menu = [( u'Save', doSave ),
							( u'Exit', __exit__ )]
		APP_LOCK.wait()
		
	





def item3():
	picselection = 'c:\\fboo.wav'  # name of file to be uploaded (path on phones hard drive)
	picselection1 = 'c:\\picture.jpg'  # name of file to be uploaded (path on phones hard drive)
	picselection2 = 'c:\\yourFile.txt'  # name of file to be uploaded (path on phones hard drive)

	
	def fireupfile():		
		ftp = FTP('www.palplanet.net')     # give servername
		ftp.set_pasv('true')
		ftp.login('xxx','xxxxx')     # give login anonymous
		ftp.cwd('public_html/wavfiles')  # give correct folder where to store the image
		F=open(picselection,'r')
		F1=open(picselection1,'r')
		F1=open(picselection1,'r')
		F2=open(picselection2,'r')
		ftp.storbinary('STOR fboo.wav',F,1024) # give name of image to be stored as URL
		ftp.storbinary('STOR picture.jpg',F1,1024) # give name of image to be stored as URL
		ftp.storbinary('STOR shata.txt',F2,1024) # give name of image to be stored as URL
		ftp.quit()
		F.close()

	if appuifw.query(u"fire up stuff?","query") == True:
		fireupfile()            
	
	

def item4():
    appuifw.note(u"Created By Mani ", "info")
	

app_lock = e32.Ao_lock()
appuifw.app.menu = [(u"Camera", item0),
					(u"Audio", item1),
                    (u"Text", item2),
					(u"Fire", item3),
					(u"About", item4)]

appuifw.app.exit_key_handler = exit_key_handler
app_lock.wait()

I click on camera in the menu list and use the cam...then move to audio and record some voice then in the audio menu when i click on camera and try going back to camera mode it shows a blank screen...please help..