send/receive mails

Hi,

I use the latest version of module poweremail
I tried to send mails via poweremail,
I created a mail in the outbox folder and tried to send it manually by pressing the button send / receive account and I sent by clicking on the button send mail mail created. but the mail does not reach the recipient and no change in status.

I also tried to send using the action planned (scheduler poweremail). but the instant trigger for sending mail outbox folder, nothing happens and the mail is not sent.

I can not really find a solution for this problem.
Thank you answer me as soon as possible

I use version 5.0.6 of openerp
OS: Windows XP