I have macros created in excel 2003 (*.xla) as an add-in and wanted to
upgrade them to excel 2007. Also, there is an excel template (*.xlt) that
works in conjunction with these macros.

First, I open the files and save as 2007 file formats and trying to get them
work. But, it is not working. What should I do?

Any suggestions would be greatly appreciated.