Go into your
Control Panel. In the column running down the left-hand side, there is a Miscellaneous section right at the bottom. In this section, you will see "
Ignored Threads". Click on that, and it will give you a list of all the threads that you currently have on ignore. Next to each, there will be a link that says "stop ignoring this thread". Click that, et voila - you will be able to see the thread. :)