Good, so it actually attempted to send the email.
Can you put a break on the Docmd.SendObject and inspect the sEmails variable in the immediate window. What email client are you using? If Outlook I believe you need to go into File\Options\Mail\Send Messages and make sure the setting "Commas can be used to separate multiple..." is checked. Or change the code I've sent you and replace the comma with a semi-colon which is the default Outlook separator.
Cheers,
Vlad