I have encountered the similar problem some days before. I found a
good tool called Advanced Outlook Repair. You can download a free demo
version at http://www.datanumen.com/aor/aor.exe . I think it is a
useful repair tool for you. It is easy to recover your PST file by
using its wizard. It is a powerful tool to recover messages, folders
and other objects from corrupt or damaged Microsoft Outlook PST
files.

Detailed information about Advanced Outlook Repair can be found at
http://www.datanumen.com/aor/

Wangdong