Send a copy of mail?

Hi all,
I used the php mail(), to send a mail with attachment. It is working fine…

but when i use the same function, to send a copy of the recent sent mail, to myself… it is not working…

Is there any problem?
or how to send myself…

Thanking you…

http://www.php.net/manual/en/function.mail.php

See a look at the additional headers in example #4