Product Key is not accepted

Hello!
After trying to register my Version of FlashFXP
I get a message
Error Saving Registration Key

File Permission denied
Filename: C:\Program Files\FlashFXP.key

I'm using Vista and am the administrtator.
The key is copied and pasted from the e-mail
i don't have an idea what it is.

Thanks for your time and help.

Hello,

The problem is that your FlashFXP installation is not correct for vista. On Vista it is recommended to use the application data folder to store your data files, if you choose to continue using the c:\program files\flashfxp location you need to change the folder permissions so that FlashFXP has permission to save files into that folder.