when i input code1 and code 2,There is an error prompt
"make sure that you have input the correct code number........"
the serial number:990-4h-NT-9977-F3CF
the number on Hardware dog ：990-4h-NT-9977
and Siemens replied that serial number is correct ，so I don't know why installation failure ？
Someone is willing to help me, I would be very grateful