Vdids85,
If you are the OP of the thread you should receive an email when someone responds to the thread.
If you want to know when a thread has been replied to, you can subscribe to the thread this is how:
You have to be logged in to the forum for this to work. There will be a tab at the top of the forum post called <Thread Tools> is will take you to the Thread Tools at the bottom of the thread and you can select <Subscribe to this Thread>, select how you want the frequency of update to your email.
Hope it helps...