This combination is not performing the automatic login for me, and after a
manual vpn connection, I can't get a manual login, either. I have made 3.11
and 4.91 SP2 work.

Will continue testing different versions and report back. Installed VPN
client first, used it to verify it worked, then installed C32 491 SP4.
Locally wired login via C32 491 SP4 works just fine.