We don't have a Tonido package for 64 bit yet. Meanwhile, you might want to try this:
sudo apt-get install ia32-libs
After installation, you can either launch by running tonido.sh or using GTK icon tray.
To run Tonido.sh:
cd /usr/local/tonido
./tonido.sh start
If you are trying to launch Tonido with GTK tray icon support and don't have GTK IA32, then run:
sudo apt-get install ia32-libs-gtk
Tonido runs on Ubuntu, Xubuntu, Kubuntu 8.04 and above
Tonido comes as a Debian package
Tonido has not been tested on previous versions of Ubuntu
Tonido can be installed on 64 bit versions of Ubuntu. See instructions below.