[Evolution] Delete server mail

[Gurrio <gurrio yahoo es>]

Hi,
i've just installed evolution 1.4 and I've a problem, i can't delete the
mail messages from the server, and evolution downloads them every time i
check the mail.
I haven't selected the leave messages on server but, evolution doesn't
delete them
  Tools / Settings / Mail Accounts / <account> Edit / Receiving
Options>  [ ] Leave messages on server
What can i do?

TNX