Sending mail to Requisitioner when PR is created

Hi All,

I'm just trying to send mail to requisitioner. But I can not do it.

Here is what I do;

In the Agents when I chose User and write a username there is no problem. Everything is ok. But when I write there the expression "Requisition.Requisitioner" it doesnt work. It doesnt't send mail to requisitioner that I write down when creating the PR.

Here is the screenshot.

http://img405.imageshack.us/img405/6334/gs2t.jpg

I don't understand what is wrong here.