First, Do you have Deskscapes 8 installed and activated properly, please post your About Deskscapes info here:
Your computer has a Windows Experience Index base score of 5.9 Your Windows Graphics Experience score is 8
DeskScapes appears to be activated on this PC DeskScapes engine appears to be running
(Generic PnP Monitor) 1 is attached to AMD Radeon HD 7800 Series (Dell P2411H(Digital)) 2 is attached to AMD Radeon HD 7800 Series
Deskscape.dll 2013/02/21 06:13:00
Deskscapes.dll 2013/01/28 07:16:52
DreamControl32.dll 2013/01/21 10:19:42
DeskscapesConfig.exe 2013/02/21 06:13:07
UI\Deskscape.dll 2013/02/18 12:13:10
UI\DeskscapesVideo.dll 2013/01/07 10:02:54
DreamTasks.exe 2013/01/25 07:09:58
DeskscapesVideo.dll 2013/01/07 10:02:22
Also, I recently had a similar issue, a simple uninstall using Stardock Central, a restart of system, and reinstall of DeskScapes 8 fixed the issue.
Also make sure you have the newest video card drivers installed.