Trying to HotkeyNet Maplestory, cant get movement to work

As mentioned in title i cant seem to get movement to work on the game Maplestory, however Hotkeynet does send out signals from my arrow keys but my characters wont react, all other buttons seem to work just fine (A-Z etc)
https://gyazo.com/527ade9d5cdea73819828e91fd87ebef
Link to code:https://pastebin.com/BE6Ad1Hz
What im trying to achieve:
https://www.youtube.com/watch?v=IHDJfyLO2Eg&t=1s

Probably something to with "holding" the key down. Might try sending a keydown on press and then a keyup on release or something like that. Never used HKN so can't give you any better info than that.