the WAUE_AddBCC and WAUE_AddCC functions add the addresses to the $MailBCC and $MailCC variables.
if the mail is not being sent to the cc and bcc addresses, there are two possibility:
1) the smtp server is refusing to relay for that addresses, this may happen if the bcc or cc address are the same as the from address.
2) the email is being trapped in a spam folder.
If the email is not being trapped in a spam folder, check with the host to see if they can examine the smtp servers error logs to see why the email is not being relayed to the cc or bcc addresses.