activation/registration code ' invalid'

I registered this program and it worked fine. I saved the code but when I try to load the program on a new laptop and enter the code it says - invalid (or similar)
I copy- pasted it from your email to me into notepad so its not that it was copied incorrectly.
A thousand apologies - I have two other email harvesting programs - I was using the ser# from another
with a similar sounding name as yours. :oops: