When you start something within an SSH session, you don’t have any active window server ready to serve your app, so RemotixQC can fail to start.
The workaround is to use Xvfb, a virtual X-Server:
1) Install Xvfb: sudo apt-get install xvfb,
2) Connect via ssh,
3) Run the following commands:
Xvfb :1 -screen 0 1024x768x24 &
Note that fluxbox here is just an example of a window manager. You may run any other one or even start a full-fledged desktop environment (e.g. Gnome).