if that doesn't work
wipe cache in android recovery
https://motorola-global-portal.custhelp.com/app/answers/detail/a_id/48517
Turn off phone
Press and hold Power key + Home hard key to power on the phone and bring up a triangle with an exclamation point inside next to a green Android graphic.
Press both Volume buttons down together to show the Android recovery menu.
Use volume buttons to scroll up or down in this menu. Highlight "wipe cache"
Tap Power button hard key to confirm the selection.
When format is complete, Tap Power button when prompted to reboot (Reboot system now will be highlighted)
if phone does not reboot
Reset instructions for DROID X on 2.3 Gingerbread Android:
Turn off phone
Press and hold Power key + Home hard key to power on the phone and bring up a triangle with an exclamation point inside next to a green Android graphic.
Press both Volume buttons down together to show the Android recovery menu.
Use volume buttons to scroll up or down in this menu. Highlight "wipe data/factory reset"
Tap Power button hard key to confirm the selection.
Handset will ask you to "Confirm wipe of all user data"
Select "Yes -- delete all user data"
Tap Power button hard key to confirm the selection and start wipeout of phone, handset will begin to format handset showing progress with multiple lines of ellipses (....)
Handset may take from 5-20 minutes to format.
When format is complete, Tap Power button when prompted to reboot (Reboot system now will be highlighted)