My bad.

It's meant to run only on Excel 2007/2010.

As far as I am aware, an .xlsm file will not run on Excel 2003 at all due to the radical changes made to Excel when they released 2007.

I just made the assumption that no-one uses 2003 or earlier any more so I never thought to mention it.

Helpdesk Job closed.

Neurokahuna