Doc responses was not working on a notes 6.5 server and a 7.02 client, old agent code from release 3, should have worked.

This sounds common:

http://www-10.lotus.com/ldd/nd6forum.nsf/55c38d716d632d9b8525689b005ba1c0/ffc7f4c0e8ac777e85256d260076a40

http://www-10.lotus.com/ldd/nd6forum.nsf/55c38d716d632d9b8525689b005ba1c0/c456febaf77d458a852571240037778

I copied the databse to local and it worked ok.

Only failed on the server.

I changed code from

set col.=source.document.responses

to

Dim unid As String
unid=source.Document.UniversalID

ss=|Form="Child" & @text($REF)="| & unid & |"|
Dim col As notesdocumentcollection
Set col = db.search(ss,Nothing,0)

not as elegant but it worked.