Since several days I'm trying to test sciii but with no luck

The problem is with connection between vncviewer_ssl and distributer5.
When I'm trying to coonect, vnc viewer hangs on "negotiate protocol version" status. During this time the error "Unable to connect to destination host, errno=0" is logged on the repeater. Winvnc connects to this repeater without any problems.
I've tried to test connection using uvnc repeater and sciii_test4, but got this same error.
Has anyone any idea what is wrong?
Regards,
Kris