in place upgrade from GMS 204 to GMS 301 on Windows Server 2003

all appeared to go ok with server upgrade

uninstalled client from Nokia E71, downloaded and installed new client for
Symbian 60 3.1 and installs ok, but is unable to authenticate to GMS server

on client, I try to set up email, configure username, password, server name
and access point, then it attempts to validate. After about a minute returns
with "Unable to connect using the information provided. Please try again"

no activity on POA screen, no entries in Intellisync server logs

any suggestions?