Orbweaver Chroma Stealth single key input only

So I've been putting this off for a while... but as the title says, the keypad only registers one input at a time. So if one key is pressed (say key 1), no other input from the keypad will register until after the first key is released. which makes strafing or any other multi-key input impossible. I've tried the standard troubleshooting, but no luck. Any suggestions would be appreciated.