Once all tuned, an Outlook need to close it and put a file instead of what has been
created by the program. Lies in the C: \ Documents and Settings \ Account \
Local Settings \ Application Data \ Microsoft \ Outlook.
Another may be such that pst file to become corrupted. if you have ost file, you can try to recover information from it. But you will need to convert into pst file. This will help you this program. I always use it.
And then repeat all the steps you did before.