Mail merge problem with Word version 11.8134.8132 but not 11.8106.8107

[Nexus]

We have PCs here using Office 2003 and some have the very latest Office
updates.

We can not get Mail Merge's to work with Excel documents when using Word
2003 version 11.8134.8132 but it is ok with 11.8106.8107.

When you get to Data Source and you select the Excel file, it does not open
correctly and brings up a database properties window.

If you then select OK, Word crashes.

Anyone know how to fix this and what update causes this?

Thanks