Vista - Outlook email

Okay I have a problem. The other day I had to reinstall vista on my computer. It took me many times to get it going. Before I did the reinstall i was using outlook for my email. So i get the reinstall done after 6 times of trying, the only way i was able to get it to work was buy deleting everything on the hard drive. Anyways i got it reinstalled. So then I went to my email on the web.. as in webmail. ...... . When i got there all my emails were deleted . I had like 300 emails in the deleted box but i never empty it. Is there any reason why this would happen.

hope someone has the answers..

Also i went and looked into my husbands email and all his deleted emails in the deleted box are gone too and he didn't delete his either