lost mail

[Dr.Michael Stoma]

I have recently had to reinstal my OS on my computer and I have insalled KMAIL 
1.9.7 (using KDE 3.5.6), I then tried to import all my mail from the previous 
installation. Now when I oper newly arrived mails there is no problem, but 
when I try to consult an old mail I see the Sender and subject in the preview 
window but when I click on it it changes to Sender Unknown and Subject is No 
Subject. 
Is there any way arround this?
MHS
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