Ebox https problem

[XTeo]

Hi , my problem is :
I use Ebox like transparent Proxy but the client PCs can't open https pages,
like gmail.com, hotmail.com, etc.

This warm apear : (it's important ?)
ebox :/# ps -fea|more

root 3368 1 0 09:04 ? 00:00:00 runsvdir /var/service log:
.................................................. .................................................. .......[Fri
Apr 27 09:05
:17 2007] [warn] module mod_ssl.c is already added,
skipping?.....................................



What can I do, please give me idea

This is mi configuration : Internet - Firewall - Switch - PCs and Ebox

Thanks

XTeo