I'm having problems geting your *ats file, couse it is hosted on rapidshare and I'm behind proxy. Can you please upload it somewhere else, like box.net. ouse this way I'm not certain what is the cousing the problem with the activation. I can see that the SLIC is present, I double checked the mod and there are no errors. You dont need to reflash the bios to activate.
You dont need to restore your original unmodded bios. You can flash directly with this one and use the backup file as dumy file. Take note that flashing under windows is risky couse a lot of things can inerfere with the flashing process. Flash the same way as you did the last time from widnows, turn off all unnecesary programs.