During Start Up, you can fix the app close main
error..
1) Open your filemanager/explorer (if you don't have one go to downloads section).
2) Go to c:\system\bootdata and delete FirstBoot.dat.
3) Turn off your phone and take out your MMC card.
4) Turn on your phone and put in current time/date.
5) Wait for it to boot up then turn off phone again.
6) Put MMC back in and turn on your phone. You can also try deleting the monlog.txt file in c:\nokia to avoid app close errors.