I was failed to registering in SC6 with SC8 serial key.

Hi,
I am using SC8.
I have installed the SC6 to meet the php version this time.
Although I entered my serial, it failed to register.
Please feel free to tell me what to do.

human

You can register only once for each version. For SC6 you need another key. To find it you can logon to your control panel on scriptcase and find it there (provided that you have bought SC since version 6)