ISBoxer.com

buttontest.iss

- detected clicks from buttons 1, 3, 4, 5
- failed to detect clicks from buttons 2 and 6

Lavish.Buttontester.exe:

(04CA-0027 0x1,0x9) USB Multimedia Keyboard: attached
(04CA-0027 0x80,0x1) USB Multimedia Keyboard: attached
(04CA-0027 0x1,0xC) USB Multimedia Keyboard: attached
3 input devices attached
Waiting for input...
Press the ESCAPE KEY to stop and Copy the results (for Pasting).

--Did not detect any mouse clicks at all--

If you're using the software for the mouse (which isn't required unless you're programming the buttons), then it needs to be running with admin privileges. Otherwise, the site indicates that it's a standard mouse and should work just like any other standard mouse.