If you are using Windows XP or Windows Vista, make sure the Lock the Taskbar option is not enabled. To check the status of the taskbar:
1. Click Start, point to Settings, and then click Control Panel.
2. Double-click Taskbar and Start Menu
* On Windows ME click Advanced, and then make sure that there is a check mark beside Enable moving and resizing in the Start Menu and taskbar list under the Taskbar heading. If the check mark is not there, click the box to select this feature, click OK, and then close the Control Panel window. If the check mark is there, click Cancel, and then close the Control Panel window.
* On Windows XP and Windows Vista select the Taskbar tab and make sure that there is not a check mark beside Lock the Taskbar. If the check mark is there, click the box to unselect this feature, click OK, and then close the Control Panel window. If the check mark is not there, click Cancel, and then close the Control Panel window.