We just recently has an ACS replaced. I went into the GUI and it's asking for a PAK which I dont have. I called cisco and they're asking for a sales number which I don't have it was never provided to me upon purchase. It was a free replacement from cisco. Cisco now is saying they dont have any info on my new ACS serial number and are asking for sales number or PAK. Am I supposed to somehow register the hardware under smartnet?