reg : Mail step

hi,

I have a user decision with approve reject outcomes.

and this user decision step is sent to 3 different users (USERID1, USERID2, USERID3) with help of RULE.

when user 1 clicks approve .......a mail is sent him(to his userid USERID1) saying that he clciked approve outcome.

similarly

when user 2 approves .......a mail is sent to his userid only(to his userid USERID2) ,

when user 3 approves .......a mail is sent to his userid only (to his userid USERID3) .

how to acheive this?????

i kept a mail step after user decision step????

bue i need to asssign the receiver ..so i selected the EXPRESSION and select the container variable &AGENT&.

But this is not working .

Can anyone help me??

Regards

arjun .