Have you installed Logitech's drivers?
@FloatingFatMan
Do not go gentle into that good night.
Rage, rage against the dying of the light.
yep. I' watching now the assignment each button has even the wheel... what should I pick for it?
Proud Coleader of: Fuerza Letal (H), Liga de las Sombras (V), Legion del Fenix (H), Infernal Justice (H), and a happy member of GammaForce (H) and D.O.A. (V).
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Well.. Firstly, I'd try removing it completely. Uninstall their driver package and go with the base ones, just to diagnose if they are the cause.
@FloatingFatMan
Do not go gentle into that good night.
Rage, rage against the dying of the light.
Ive the same problem with a Logitech G15 Keyboard and G5 Mouse, i use shift to rotate the camera. Seems to only be a problem with CoX. I'm more used to using shift nowadays, hehe.
already solved, just changed the assignment of the wheel, and now I can rotate the image as usual. 
Proud Coleader of: Fuerza Letal (H), Liga de las Sombras (V), Legion del Fenix (H), Infernal Justice (H), and a happy member of GammaForce (H) and D.O.A. (V).
My alts: http://cit.cohtitan.com/profile/13494
I've recently bought a brand new Logitech Cordless keypad+mouse pack, my problem is now I can't rotate the view for screenshots as before, believe me, I've tried; my mouse has 2 buttons and a wheel, left button does not work, right one works for directing my running or flying movement, and when I click on the wheel, screen freezes and nothing special happens, however it was pressing it in my old mouse when I rotated my toons for screenshots... any ideas/suggestions on a new way to do it?
Proud Coleader of: Fuerza Letal (H), Liga de las Sombras (V), Legion del Fenix (H), Infernal Justice (H), and a happy member of GammaForce (H) and D.O.A. (V).
My alts: http://cit.cohtitan.com/profile/13494