Absolutely, you should be helped. You have, most likely, a case of corrupted header's files. They are not deleted, but you can't see them.
The solution is simple. First you have to find the Mail folder. The folder is in C:\Documents and Settings\%USER%\Application Data\Mozilla \Profiles\Netscape-Profile\xxxxxxxx.slt\Mail from Windows Explorer.
To confuse the situation, Windows hides the part from Application Data, included, so you will have to "unhide" the settings , from View. Then, with Netscape, open the Mail folder. I am assuming that you have only one account set up, so you will have a folder with the account name, and that's where you will find a file called Inbox.msf. Delete it. Do not delete a file with no extention. Since it was not good, it will be rebuilt, and you should be abl,e to see your mail again.
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