pisi.file.Error: The integrity of http://paketler.pardus.org.tr/pardus-2007/pisi-index.xml.bz2 have a problem            

Traceback:
  File "/usr/bin/pisi", line 89, in ?
    cli.run_command()
  File "/usr/lib/pardus/pisi/cli/pisicli.py", line 111, in run_command
    self.command.run()
  File "/usr/lib/pardus/pisi/cli/commands.py", line 709, in run
    pisi.api.update_repo(repo)
  File "/usr/lib/pardus/pisi/api.py", line 430, in update_repo
    index.read_uri_of_repo(repouri, repo)
  File "/usr/lib/pardus/pisi/index.py", line 74, in read_uri_of_repo
    self.read_uri(uri, tmpdir, force)
  File "/usr/lib/pardus/pisi/index.py", line 57, in read_uri
    compress=File.auto, sign=File.detached, copylocal = True)
  File "/usr/lib/pardus/pisi/pxml/autoxml.py", line 439, in read
    compress=compress, sign=sign, copylocal=copylocal)
  File "/usr/lib/pardus/pisi/pxml/xmlfile.py", line 80, in readxml
    compress=compress,sign=sign, copylocal=copylocal)
  File "/usr/lib/pardus/pisi/file.py", line 135, in download
    raise Error(_("File integrity of %s compromised.") % uri)
DEBUG: PiSi API finalized