Soemtimes things geet wierd with the packages. Do a listing and verify the version you have. Also veryfy the version you are trying to install.
The best option is to see if there is a ppa for the wxgtk tools. Add that to your software sources and then install. You should then pull the latest from the authors respository, rather than the Canonical repositories, which do not always have the most up to date versions.
UNIX Systems Engineer
Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me. (John 14:6 AV)