Windows Key + P stopped working

I have my monitors setup in surround and often use "Windows Key + P" to switch them from surround to individual for multitasking purposes. Now when I select the other profile nothing happens. When I got back to "Windows Key + P" it shows it is on the same profile it just didn't change. Have I changed a setting and didn't know it? Is this a known issue? 


Windows 8 64bit

ASUS P8Z77-V LGA 1155 Intel Z77

Intel Core i5-3570K 

2 x GeForce GTX 780 EVGA ACX Cooler SLI

Corsair Vengeance 32GB (4 x 8GB)

Corsair HX 750 

3 x ASUS VG248QE Black 24" Portrait surround 3240 x 1920 at 144hz


Full build on my profile. 

I had the same problem so now instead of using the windows key + P I use winsplit revolution.