Capture Window Control fail when I changed HotKeys.

I change Capture Region Hotkey : Print Screen
And I change Capture Full-screen Hotkey : Shift Print Screen

Then I try to use function "Caption Window Control" ,
1 . Choice a web control
2. Press Print Screen
3. No Caption , It is become "Capture Region"

----------------------------------------------
PicPick version : 1.8.0.4
Test time: 2009/03/11
OS: Windows XP SP3