email notification sound not working
I own a iPad2 wifi. I have added my yahoo mail business account to my iPad. The current Sounds settings in my iPad is Ringer and Alerts ----> ON; Ringtone ----> Alarm; New Mail -----> ON and other settings such as Sent Mail, Calendar Alerts are in OFF mode. But I don't hear any sound alert when ever I receive an email. Do I need to need anything more to hear the sound. Appreciate your help.
iPad 2