Have purchased on line but when activating cant't get past enter product key

[cbj]

I have made an on line purchase and installed.

When I try to activate I have entered the product key supplied but the next button does not activate any ideas please.

[PCD_Channing]

Hello cbj,

I have responded to your inquiry through the support case you opened. Please let me know if you do not receive my email.

Thanks,
Channing