yumex won't start

[Doctor Who]

I'm getting the following error when trying to start yumex today:

[root at localhost yum]# yumex
15:48:38 : Yum Config Setup
Loading "installonlyn" plugin
15:48:38 : Repository 'atrpms' is missing name in configuration, using id
15:48:41 : Error Type: <class 'yum.Errors.RepoError'>
15:48:41 : Error Value: Cannot open/read repomd.xml file for repository: atrpms
15:48:41 : Traceback:

15:48:41 :   File : /usr/share/yumex/yumex.py , line 777, in <module>
15:48:41 :     mainApp = YumexApplication()
15:48:41 :   File : /usr/share/yumex/yumex.py , line 420, in __init__
15:48:41 :     self.yumbase =
YumexYumHandler(self.getRecentTime(),self.settings,self.progress,self.ui.main,self.yumexOptions._optparser)
15:48:41 :   File : /usr/share/yumex/yumapi.py , line 55, in __init__
15:48:41 :     self.repos.callback = YumexCacheProgressCallback(self.progress)
15:48:41 :   File : /usr/lib/python2.5/site-packages/yum/__init__.py ,
line 485, in <lambda>
15:48:41 :     repos = property(fget=lambda self: self._getRepos(),
15:48:41 :   File : /usr/lib/python2.5/site-packages/yum/__init__.py ,
line 336, in _getRepos
15:48:41 :     repo.setup(self.conf.cache, self.mediagrabber)
15:48:41 :   File : /usr/lib/python2.5/site-packages/yum/yumRepo.py ,
line 592, in setup
15:48:41 :     raise Errors.RepoError, ('Cannot open/read repomd.xml
file for repository: %s' % self)
Traceback (most recent call last):
  File "/usr/share/yumex/yumex.py", line 805, in <module>
    system.exit(1)
NameError: name 'system' is not defined



Packages used are:

[root at localhost yum]# rpm -qa | grep yum
yum-metadata-parser-1.0.3-2.fc7
yum-3.1.3-2.fc7
yumex-1.9.3-1.0.fc7
yum-updatesd-3.1.3-2.fc7

Any help appreciated.