Calendar Control crashes Access 97

Can anybody tell me how to resolve this please?

We have one PC on which Access 97 crashes whenever a form
with a Calendar Control 8 on it is opened. As a test I
tried creating a new form in an empty database and as soon
as I dropped a calendar control onto it Access crashed.

The PC has Office XP on it but Access 97 (required for
compatibility with other computers).

I have tried a re-install of Office 97 but this hasn't
cured the problem.