وقت به خیر

روی منوی Applications که کلیک می کنم باز نمی شه.
ادیتور منوها هم باز نمی شه. دستورش را توی کنسول زدم خروجیش این بود:
niloofar@Niloo-PC:~$ alacarte
Traceback (most recent call last):
File "/usr/bin/alacarte", line 36, in <module>
main()
File "/usr/bin/alacarte", line 32, in main
app = MainWindow(datadir, version, sys.argv)
File "/usr/lib/pymodules/python2.6/Alacarte/MainWindow.py", line 48, in __init__
self.editor = MenuEditor()
File "/usr/lib/pymodules/python2.6/Alacarte/MenuEditor.py", line 36, in __init__
self.__loadMenus()
File "/usr/lib/pymodules/python2.6/Alacarte/MenuEditor.py", line 48, in __loadMenus
self.applications.dom = xml.dom.minidom.parse(self.applications.path)
File "/usr/lib/python2.6/xml/dom/minidom.py", line 1918, in parse
return expatbuilder.parse(file)
File "/usr/lib/python2.6/xml/dom/expatbuilder.py", line 924, in parse
result = builder.parseFile(fp)
File "/usr/lib/python2.6/xml/dom/expatbuilder.py", line 211, in parseFile
parser.Parse("", True)
xml.parsers.expat.ExpatError: no element found: line 1, column 0
مشکلش کجاست؟
