Experiencing issues / problems with your mouse right click button ie.
Right click menu is not displayed.
Right click does not invoke "Enter".
etc.
The below information might just help resolve such issues / problems....
Links:
Autodesk Knowledge Base:
ID: TS31084 - Shortcut menu is not displayed when SHIFT key and right mouse button are pressed
ID: TP00079 - Time Sensitive Right-click
ID: TS16872 - Changing right-click behavior
ID: TS31569 - Dialog box is displayed when clicking right mouse button
ID: TS16320 - Changing the default action for the right mouse button
ID: TS10805 - Right mouse button doesn't display context sensitive menus
ID: TS66581 - Right-click does not invoke ENTER
AUGI Forum:
Edit Mtext in Right-click menu
Right-Click doesn't work
RIGHT CLICK GONE since I loaded WaterCAD
Short Cut (Right Click) Menu
Shift-Right Click Not Working
lost my right click options
Right click short-cut menu does not display
Missing Osnap Popup
Right Click Shortcut Menu
Mouse problem - unable to right-click to receive the shortcut menu
right-click menu options not there
OSnap menu is not working for my right click.
Osnap shortcut not working
How do I restore my 'shift + right-click' object snap menu in 2005?
Mouse right click not working.
Shift + Right click does not bring up OSnap menu
Shift+Right Click Snap override gone
Right Click Short Cut Menu disappeared.
AutoCAD LT 2002 - Right mouse button no longer equals ENTER
AutoCAD 2007 - Right Click is not working
No Right Click Selection via mouse