MS Project 2007 VBA not owrking after applying SP3 to the server

I wondered if anyone else had had this issue.

I have a number of VBA macros that were working well up until I applied SP3 to the server.  Now they are erroring with code 1004 whenever I try to set a value into a Project SummaryTask field.

For example

ActiveProject.ProjectSummaryTask.Number19 = 1

I'm assuming that there is some setting somewhere that is preventing such operations.  If anyone has any ideas I would br most gratefull.

John.