Here you can see a Tip for installing 32 Bit applications i 64 bit Ubuntu
Most of the 64 bit ubuntu users need to install their popular 32 applications. Some times it will return an error you have to use ia32 libraries. .In ubuntu Linux you can easily install ia32 Libraries.
Open a terminal type:
$ sudo apt-get install ia32-libs
Now You can install your application
$sudo dpkg -i - -force-architecture yourpackage.deb