Kde 4.10.0 and numpad shortcut

[yellowhat]

Hi all,
I have just emerged kde (kdebase-startkde) all is working fine but I have a little problem with shortcut.
I would like to resize the windows on bottom/up-left/right using a keyboard shortcut by pressing Windows Key + 1/3/7/9 of numpad just like compiz grid plugin.
But when I press this combination in settings-shortcut-kwin it shows Meta+BlocNum, if I press this combination the window resize but with every number of numpad, there is no distinction between number.
My keyboard is a logitech MX5500.
Any ideas?

Thanks