[K90] Macros Keys not working with the software in background

Hello I just bought my K90 and love typing on it but I have a problem with the macro gkeys.

In fact when ever the software isn't opened but running in background (like at windows start without touching) the macro keys doesn't work.

Multimedia key, led, sound keys and 105 normal keys are working perfectly, but those Gkey work only when I open the software.

I tried to save my profile in the keyboard and use in hardware mode. But then is doesn't work at all (even with software open)...

Can someone help pls..

PS : On a unrelated subject, playing League of Legends I notice my character sometimes stuck, I can't control it. I noticed this since I changed keyboard... doesn't it mean I have a problem?

Do you mean the keyboard is not working? e.g. you cannot type or use any of the keys?

Try reflashing the K90 on a USB 2.0 port.