1. Ensure the window you have focussed does not grab all keystrokes (like VirtualBox or VMware).
2. Ensure the Ctrl+Alt+Arrow key bindings are still configured:
(a) Run: ccsm
(b) Go to Desktop > Desktop Wall > Bindings
(c) Ensure "Move Left" and "Move Right" have key bindings configured still.
Susan, there are a few simple things to check:
1. Ensure the window you have focussed does not grab all keystrokes (like VirtualBox or VMware).
2. Ensure the Ctrl+Alt+Arrow key bindings are still configured:
(a) Run: ccsm
(b) Go to Desktop > Desktop Wall > Bindings
(c) Ensure "Move Left" and "Move Right" have key bindings configured still.