Consider running the full 188.8.131.52 UltraVNC as it supports Vista much better than SC.
Read the documentation as it has SC functionality built in:
This option modify some behavioiur for Single Click usage.
*Pass server info to viewer and request viewer accept
(This use an unofficial rfb protocol, require ultravnc viewer)
*Server quit when viewer disconnect
*Don't exit when desktop switch to UAC/winlogon