Probably stating the obvious again, but do you have the player in standby when doing this? You need to have it in standby. When you connect via windows hyperterminal (using a null modem cable), type each line then press enter on your laptop. Go through each line as per the instructions (on the thread mentioned) then disconnect hyperterminal. The player should be fine when you bring it out of standby, and it will show region 1 in the menu. If you've already done all this, then apologies for patronising you!

Good luck

George