Sometimes posts take a little while to get noticed if you do not check the little box "Notify Me When a Response is Made" when you are posting in the group.
If you want to always have this option set, you can change it in your own settings on the board by going into your User Control Panel and changing the settings for it as per the picture below:
That way when someone relplies to your post, you will get an email to tell you about it by default. So much easier and it saves having to remember to check it!
Best regards
Dubmatix