This registry key displays the path to the Windows 9x and NT default 'new mail' sound. It is recommended to first check the sound control panel to make sure a sound is selected for New Mail notification.
Key:[HKEY_CURRENT_USER\AppEvents\Schemes\Apps\.Default\MailBeep\.current]
Value Name: (Default)
Data Type: REG_SZ
More info: http://support.microsoft.com/support/kb/articles/q190/3/04.asp
