You can try a popular Outlook recovery tool called Advanced Outlook
Repair to repair your PST file. 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/

And you can also download a free demo version at http://www.datanumen.com/aor/aor.exe
Good luck!
Wangdong