aMSN-Can't receive offline messages

I can't receive offline messages from a Pidgin user. This happens when I have set up "Don't ask for confirmation when sending/receiving Offline Messages." When I cancel this setting then it appears a window saying: "You have x new Offline Instant Messages. Do you want to read them?" When I click on "Yes" then nothing happens. Don't you happen to know what's wrong? Thanks a lot for your help.