Rebecca,
It sounds like you moved just the .SCX from one place to another. You should be able to go back and grab the .SCT file and move it to the same place. If the SCT file is lost you are basically hosed because that's where all of the non-default property settings and overridden code is stored.
>Is there any way to recover a form when I get the message "Memo file in .....sct is missing or invalid"??