Razer sorround pro

Hi everyone. I bought my kraken 7.1 and registered it on the page, it allowed me to download the Razer sorround program but it does not allow me to activate the pro version, although my product appears registered. Perhaps it is because a tip appears that the proof of purchase is still necessary to request the guarantee, but I do not know how to do that. I hope I have expressed myself well and that someone can help me, since I hear the bass very strong and that is why I need to improve it with the equalizer.