Let's Talk about .. MOSS2007-Task E-mail is not sent

Yesterday, P'Aey told me after the day before yesterday I came back to test my workflow and found that the E-mail was not sent to the approver. This problem occured after there was the restoring the site from other server. She tested something and it works. What she did is just turn off the e-mail notification and turn it on later... O_o I'm still confused but it's ok

The instruction

1. Go to the setting of Task.
2. Click Advance setting.
3. Click Off at the E-mail notification.
4. Click OK.
5. Click Advance setting (again).
6. Click On at the E-mail notification.
7. Click OK.