|I'm using Word 2007 and you need to give a Direction when trying to get to the TOC|
On my Word 2007 the steps are the same as your, with the exception of:
In the Enter field name: field type 'toc'
Try using: -TOC << NOTE the Dash before the letters TOC
There is a short note in my Find & Replace box which reads:
"Enter a + and - to move relative to the current location. Example +4 will move forward four items."
Also, my Enter field name: input box has a drop down.
If I scroll down a bit TOC is one of the choices.
There is also Previous and Next buttons.
Using Previous will also get me back to the TOC.
Try it with the dash or use the Previous button
and see if either helps.