Problems with the Activity portlet

I'm seeing: -

[6/3/10 8:56:01:897 BST] 00000095 ServletWrappe E   SRVE0068E: Uncaught exception thrown in one of the service methods of the servlet: /genjsp/lcaccelerator/portlets/ActivitiesPortlet_myActivitiesMain.jsp. Exception thrown : java.lang.NoClassDefFoundError: com.ibm.connections.directory.services.DSProviderFactory (initialization failure)

at java.lang.J9VMInternals.initialize(J9VMInternals.java:134)

at com.ibm.lconn.lcaccelerator.util.UserUtil.searchForUserByAttribute(UserUtil.java:53)

at com.ibm.lconn.lcaccelerator.util.UserUtil.getCurrentUserEmail(UserUtil.java:138)

...

having deployed the out-of-the-catalog Lotus Connections 2.5 portlets

https://greenhouse.lotus.com/catalog/home_full.xsp?fProduct=Lotus Connections&fSearchValue=1WP1002A6#

to my WebSphere Portal 6.1.5 cluster, configured against Lotus Connections 2.5.0.1.

This Technote: -

The Activities Detail Portlet displays an "error has occurred" message

was of some interest, but relates to group membership in LDAP, whereas my exception relates to ( I believe ) the fact that my Connections users do not currently have email addresses, either in LDAP or in their profile.

Am going to test further ....