Can't move spaces from one screen to another

I am using OS X 10.9. I am unable to drag Desktops from one screen to another, I am only able to switch arrangements on the screen that its on.

Here are my Mission Control settings

EDIT: Very strange, after a reboot the functionality seems to be working now without me making any changes.

Solution 1:

You can only move non-active desktops between screens.

If the desktop you want to move is the only desktop on the screen, then create another desktop, make that the active desktop, and then drag the non-active desktop.

Solution 2:

Too late for the OP, but for future reference, my issue with this was resolved as suggested by Wes Campaigne above. Sometimes my Mac (laptop + two external monitors) wakes up with the desktops on the wrong monitors. I could not understand why I was unable to move them back to the right monitor - they would just hit the edge of the monitor and I could not drag them any further. The solution turned out to be to create a fresh desktop on the monitor in question, then make the fresh one the active one. Upon starting Mission Control again, I was able to drag my desired desktop to any monitor, and then make it active again.