my mouse freezing up for no reason

Hey people of the NA.Boards. I am using a Razer Lachesis mouse, and i am going to start using a Nostromo for league. and I want to keybind the items to my mouse buttons. But the problem is that my MB2 is freezing, makes my mouse button illumination start switching on and off. anyone else have this problem? It only happens with the top mouse button to the right side. it makes the mouse scroll button light just go from blue to nothing, and its freezing my mouse. its starting to become an issue.