Word 2002

My data source necessarily contains two groups of address fields (T and U
[Tenant and Unit]). Fields in group T are for special reasons, Group U data
is used by default. For the merge system I'm working on, the user will need
to select from T/U, where data exists in T, otherwise the merge uses group U
data automatically

I have used the MailMergeAfterRecordMerge event to interrupt the merge when
address data is found in address group T. A userform displays Address
records T & U for the user to select which should be used for the current
letter. The user clicks the appropriate button, and the corresponding
address is dropped into the merge. (Merge to New Document)

I'm using AFTERrecordMerge, as some of the data is dropped into a text box,
which doesn't yet exist if I use the BEFORE version of the event.

PROBLEM:
This works well - the appropriate data appears in the Letters1 document
generated by the merge, EXCEPT for the first record, which appears in the
Form document. The first page(s) of the Letters1 document are blank where
the merged data should appear.

Any ideas?

Thanks for your time