This is most likely a configuration-related issue. Check your mouse settings in Logitech Mouse and Keyboard software (SetPoint). To check your settings, please do the following:

NOTE: Your mouse will be identified in SetPoint as M705.

1. Launch SetPoint (Start > Programs > Logitech > Mouse and Keyboards > Mouse and Keyboard Settings). If you do not have SetPoint installed, please download it from the MK710 Downloads Page.

2. Click My Mouse tab at the top and choose the M705 from the Select Mouse drop-down menu:

   

3. Choose the mouse button you wish to customize in the Select Button field:

   

4. Choose the task you wish to assign in the Select Task field:

   

5. Some options may generate submenus. If so, choose your settings in the submenu.

6. Click Apply to save your settings. Click OK to exit SetPoint.

Additional Information:

If the above solutions do not resolve your problem, consult Knowledge Base article 16805 for instructions on contacting Logitech Technical Support.