I've just done this on my phone. Could somebody please post a reply to see if I get a notification, cheers.
Where is this mysterious "thread tools" you speak of? Sitting at computer and have gone into settings and put on the e-mail thingy?
Your looking to high up the page, just above where the first line of the thread is... Rate this thread, view first un-read and the other stuff.
Tried that and nothing? Not for the first time in my life I'm gonna have to hold my hands up and say "I must be doing it wrong"!