Corel Draw X6 64 bit won't install on WIndows XP X64 SP3

Hi, i'm running on WIndows XP X64 SP3 AMD ATHLON II 64 - Mem 4Gb), i had install .net framework 4 and i've tried to install Corel Draw X6 64 bit on my system but the screen always shown the warning message "your system has been not modified, the processor in your computer does not meet the minimum system requirement". Is it because of Windows XP x64 or the processor? Thank you...