Email was not sent when make changes to Event plugin

Hi

I have read your discussion forums and try the recommended ways listed. However, it does not work for me.

1. Email was not sent out when creation / modify of event
2. Email for E-newsletter was sent out after numerous time of refreshing the screen (e.g. if email was to send to 3 users, would need to refresh the screen 3 times in order for email to be send out)
3. Images could not be display after change of permalink to display by postname

Could you please help?