when i signed up, the first thing i did in my profile was set for instant subscription- so you could perhaps try that.. go to your profile, edit board settings, subscription options.

another way ofr doing it (maybe a little extreme), is subscribing to the forum in question where the thread is.

at the bottom of the forum their's a link " subscribe to forum". the disadvantage of that is that you'll get in the updates all the threads (even the new threads started), but you won't get a single email for each thread- it will be 1 update email, with all the activity in that forum over the past 24 hours.

the good thing is, that you will get the updated threads- and that includes the ones you posted to

hope these 2 methods help