yumex not x forwarding

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http://forums.fedoraforum.org – Have putty working with ssh and xming to forward x to my windows. I'm having trouble getting yumex to forward. $ sudo yumex [sudo] password for user: PuTTY X11 proxy: wrong authorisation protocol attemptedTraceback (most recent call last): File "/bin/yumex", line 25, in <module> from yumexgui import YumexApplication File "/usr/lib/python2.7/site-packages/yumexgui/__init__.py", line 27, in <module> import gtk File "/usr/lib64/python2.7/site-packages/gtk-2.0/gtk/__init__.py", line 64, in <module> _init() File "/ (HowTos)