Be careful of uninstallation. I wouldn't recommend it. What I would do is: 
perl Build.PL wxWidgets-version=2.9.4

[download]
I use CPAN. Did you know that you can configure CPAN to uninstall for you? It'll uninstall conflicting files, but don't use it if you use INSTALL_BASE. Enter the CPAN shell: 
cpan> o conf init mbuild_install_arg
cpan> --uninst 1
cpan> o conf commit

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Check that the change took effect: 
cpan> o conf mbuild_install_arg
    mbuild_install_arg  [--uninst 1]

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Now do 
cpan> o conf init make_install_arg
cpan> UNINST=1
cpan> o conf commit
cpan> o conf make_install_arg
    make_install_arg  [UNINST=1]

[download]
It worked. You're done. Now install Wx.

Update: Revised

In reply to Re^6: Need help installing wxWidgets 2.9.4 by Khen1950fx
in thread Need help installing wxWidgets 2.9.4 by HelenCr

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