Thanks

Check your notification preferences.

1. Click on your username in upper right-hand corner (next to the "Start Discussion" button).

2. Click "Edit Settings."

3. Scroll down and review what's checked in the "Message Preferences" section.

4. If you make any changes, click "Save."

If that doesn't solve the problem, be sure to check and see if they're somehow winding up in your spam/junk folder.