Laggy mouse movement and long kyboard stroke

[Hojjat 1]

Hi, I'm using Synergy 1.7.5 on a windows 7 (as server) and on an Arch linux (gnome 3 desktop). The connection is WLAN. The mouse movement in the client is laggy and also when I'm typing something (like right now) some characters are repeated like when you press and hold a key on your keyboard. (ex. movement => movvvvvvvvvvvvvment). Am I doing sth wrong or should I just forget about Synergy and move on?? Thanks, Hojjat