On the Updating Information... page, scroll to the Marriage Details section and click the down arrow to the right to change the menu item from No change to Correct / Delete. Then, click the blue Continue button.
On the next Updating Information... page, change the Action from Keep to Correct. Then, click the blue Check these updates button.
On the next Updating Information... page, in the Marriage Details section, the name is currently listed this way:
Spouse: Matthew Walters
Type the name this way:
Waters, Matthew (I)
Also, click the check box to the right of the statement next to the Spouse form:
Listed in IMDb:
Click the blue Check these updates button.
The form should now be green. Click the blue Submit these updates button. If accepted, the link should be updated on the IMDb servers within a week (or less).