How to set up MouseButton4 on TeamSpeak

Is there a way to set up Button4/5 to push-to-talk in TeamSpeak? For Example: In Firefox I can undoing and forwarding but TeamSpeak doesn't recognize clicks. I'm using Arch Linux and my mouse is SteelSeries Rival. EDIT: [malloc@arch ~]$ xinput ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ SteelSeries Rival Gaming Mouse id=11 [slave pointer (2)] ⎜ ↳ SteelSeries Rival Gaming Mouse id=13 [slave pointer (2)] ⎜ ↳ AlpsPS/2 ALPS DualPoint TouchPad id=15 [slave pointer (2)] ⎜ ↳ DualPoint Stick id=16 [slave pointer (2)] ⎣ Virtual core keyboard id=3 [master keyboard (2)] ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)] ↳ Power Button id=6 [slave keyboard (3)] ↳ Video Bus id=7 [slave keyboard (3)] ↳ Power Button id=8 [slave keyboard (3)] ↳ Sleep Button id=9 [slave keyboard (3)] ↳ Laptop_Integrated_Webcam_HD id=10 [slave keyboard (3)] ↳ SteelSeries Rival Gaming Mouse id=12 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=14 [slave keyboard (3)] ↳ Dell WMI hotkeys id=17 [slave keyboard (3)] [malloc@arch ~]$ xinput get-button-map 11 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 [malloc@arch ~]$ xinput get-button-map 13 1 2 3 4 5 6 7