I think that cert is same as vista and windows7. so I guess you might be put VISTA key or put different product key of windows 7. check the oem-xxxxxxx number with yours and key
I had already played with winphlash settings, crc, without luck BUT! /nochk did the job ! Flashed ... and activated !!! Thank you (command line was Winphlash2.exe /spi /bbl /sd /nochk R0071N7_SLIC.WPH)