This typically happens after Microsoft updates their Windows Media Player. The updates change registry entries and Inscribe needs to re-associate itself with the media player.
This is how to fix the error Parameter is incorrect within Inscribe.
- Log out of Inscribe.
- Start Inscribe, but "BEFORE" you log in click the "OPTIONS" button.
- Click the button at the bottom of that Window-box called "REG MS MEDIA".
- After you click that button and it will come up with a "Reg...Successful" click "OK" and then log into Inscribe normally.