New emails not displayed in Inbox until opened

Hi,

I hope someone can assist with a new problem that has arisen with my Windows Live Mail.

When new emails arrive in my default account the number of unread items shows in brackets alongside 'Inbox', and similarly in  Quick views alongside 'Unread email'.  However if I access the Inbox, no new emails are to be seen.  Only after I click on Unread emails in Quick view and open the email does the email appear in the Inbox of my default account.

I have 3 other email accounts and things appear to be normal in each of those.

Please advise what I can do to fix this weird behaviour,

Thanks,

Roger