This is my first post ever, so let me know when it´s useful to you.
This package seams to be i386 specific, with no amd64 version available.
Apparently linux system can cope with packages meant for different architectures using e.g. multiarch (ubuntu 11+).
This is how I installed a working version of 2xclient in the Terminal on my Linux Mint 15 64 bit.
Download the appropriate package from www.2x.com
tell the system to accept i386 packages
sudo dpkg --add-architecture i386
update the available packages from repositories
sudo apt-get update
install the downloaded package (go to the directory first)
sudo dpkg -i 2XClient.deb
You may need to fix broken dependencies using apt-get (didn´t do anything in my case)
sudo apt-get -f install
Check which files where installed from the package
sudo dpkg -L '2xclient'
View the library dependencies of the binary, in my case as follows
in my case the missing dependencies are 2 files: libxml2.so.2 and libXpm.so.4
Find the packages that own these missing files
sudo dpkg -S 'libXpm.so.4'
sudo dpkg -S 'libxml2.so.2'
which resulted in the information below:
libxml2.so.2 libxml2 :amd64
libXpm.so.4 libxpm4 :amd64
Install the packages containing the missing files, with a explicit architecture reference (i386)
sudo apt-get install libxpm4:i386
sudo apt-get install libxml2:i386
check your dependencies again
Start up the 2xclient from your applications menu and you are good to go !! (I hope)
BTW jump from your 2x RDP session (remote desktop) to your own desktop with keyboard shortcut windows-alt-m