Office 2003 data links to .xlsx

[happyman]

we have an XP sp3 machine running Office 2003

The problem is with some .xls Excel Spreedsheets which contain data links to some newer .xlsx files.

The links don't seem to update without opening the .xlsx file (office 2007 Compatability pack is installed) although links to .xls files seem to update fine.

Any suggestions would be much appreciated.

Cheers

Rob