CrossDJ LE - key assignment issue

Hello everybody! 
I'm new user of CrossDJ LE software I bougt with Dixon 1ST Mix (marked as SilverCrest by Lidl market).
Software is powerfull, but I found a little bug (?). It's unable to assign keys "/" , "*" , "-" , "+" and "." on numeric keyboard. Truelly it's possible but Cross doesn't respond on pressed key listed above. It's problem for me, becouse I've got usb numeric touchpad/keyboad attached to my notebook and I wanted to assign those 16 keys to hotcues and most important for me - headphones activation for decks A and B. It woluld be more comfortable to place this pad near Dixon instead reaching notebook keyoard behind controller.
Does anybody knows solution for this problem?
b.r.

I'm new user of CrossDJ LE software I bougt with Dixon 1ST Mix (marked as SilverCrest by Lidl market).
Software is powerfull, but I found a little bug (?). It's unable to assign keys "/" , "*" , "-" , "+" and "." on numeric keyboard. Truelly it's possible but Cross doesn't respond on pressed key listed above. It's problem for me, becouse I've got usb numeric touchpad/keyboad attached to my notebook and I wanted to assign those 16 keys to hotcues and most important for me - headphones activation for decks A and B. It woluld be more comfortable to place this pad near Dixon instead reaching notebook keyoard behind controller.
Does anybody knows solution for this problem?
b.r.