[fetchmail]Fetchmail fails to retrieve mails

Hi everybody,

I´m writting because i´ve a problem when i try to fetchmail from five email
accounts.  I run fetchmail -a -v to retrieve all mails in that accounts but
fetchmail retrieves only for three of them , and i know in that accounts
there´s mail.
I´m not receiving any kind of error or flushed message and don´t know what
else to do...

Thanks in advance,

Gabriel.