[Trlog] Partly corrupted logfile

Thu May 10 16:34:43 EDT 2007

After Helvetia Contest with HB9BSL I had a partly corrupted logfile.
The first 389 QSO's were OK but after that 222 QSO's only chinese. It 
looks like...

*80SSB 28-ALLLLLLLLÿÿNeÿÿÿÿQeReSeTeUeÿÿ....

**.......vvvvÿÿÿÿvv2007 Helvetia Contest HB9BSL
 Band    Date    Time  QSO#  Call worked   Sent Rcvd Rcvd   Qth     
Mults   Pts
 ----    ----    ----  ----  -----------   ---- ---- ----  -----    
-----   ---
 40SSB 29-Apr-07 12:08  651  PD0LDC         59   59    
14                    1

*After QSO 651 all was OK but in the mean time I lost 222 QSO's!

What did I wrong?
What can I do?
Can somebody help?

Charly hb9ebm