Which subscription type do you use? This is from the FAQ-
No Email Notification - lists the subscription in your User CP only. You do not receive any notifications about new posts or threads in the forum.
Daily Email Notification - sends one email a day with the new and updated threads in the forum and any sub-forums. If there are no new or updated threads in the forum or its sub-forums then you will not receive an email.
Weekly Email Notification - sends one email per week in the same way as the Daily Email Notification.
Thread Subscriptions have the same options as forum subscriptions with the following additional option:
Instant Email Notification - sends an email as soon as a new post is added to the thread. This is not sent for every reply and will only be sent once until you revisit the forums.
I'm sorry if that doesn't help, anything beyond that hopefully admin will look into it.
'02 Vulcan 1500 Drifter
'07 Vulcan 900 Classic
'06 HD XL1200C
'76 HD XLH
Patriot Guard Rider
SCRC, Rolling Hills Chapter 314