I have checked that site (Foxes Team), but they seemed to have shut down around 2006 - so if it is a compatibility issue between 2003 and 2007/2010 versions I don't know (except a different Add-In from there does not behave this way).

"Yes, dear friends, after more then 10 years, the activity on this site is closing.
This site will be still open for a while, as a sort of ancient miner, but none new software will be released."

Now, the xla document is not password protected, so if there is something I can manually search for that is also possible...