OL2003 Public Folder Contacts Activities

In our company we use Public Folders in Exchange Server 2003 to record
Customers and Tasks (custom Forms) organized in different folders one
per year.

It is very useful to monitor Customer History, using the Activities
Tab in Contact Forms. In that way, we can choose a year and check all
Customer Tasks that took place that year.

This scenario works fine with Outlook 2003 clients.

Unfortunately, in Outlook 2007 the Activities Tab in Contacts does not
work as expected. When first clicked (to display the default Tasks
Folder) it shows a list of irrelevant tasks. Then when choosing
another year (Folder) it shows nothing.

Any suggestion would be greatly appreciated.

- yannis