Be sure that my BB5 logger is installed properly with apropriate FBUS interface (DKU-5) or old clasic FBUS cable connected to standard COM port.
Once connected phone by FBUS interface to PC, press "Read Phone" button. If everything is ok, some data will be readed and displayed, otherwise check your connection, phone, cables, etc.
If logger shows message "SP Data IS corrupted" than you have phone that somebody played with it and destroyed field 308,1. So, you have to fix that field by sending that phone to official NOKIA repair centre!!!
If everything is OK you can press "Make Log" button. LOGER will create backup of field 308,1 and try to make LOG file. In that process, sometimes field 308,1 can be corrupted which can be checked by clicking again on "Read Phone" button.
NOW, if logger shows message "SP Data IS corrupted" than you just have to click several times "WR Backup" and "Read Phone" to check that is your phone is OK.