the latest pads release VX1.1 supports only 64 Bit windows 8.1 version ( from the system requirements pdf), if you have installed it in 32 bit machine, that would have created the problem.
oh i forget to say i used window 8.1 64bit but i solved this problem.
thanks for your comment
so, is it because of the graphics drivers?
No, it is Value of powerlogicres.dll and powerpcbres.dll file problem.
namely it is coordinate Value of Resource problem.
i used tool 'reshack', i change the coordinate Value of Resource.
in fact, i heard to some one in koean electronic community site.
if i can possible, i try to explain how to fix it
(but i poor at speeking english so, i can explain it well...)