Sorry, I'm not that good at it.

May be Duokan is not launched because you are not pressing SHIFT-D-S fast enough. You can change the launchpad .ini file to allow pressing slower.

Also see the following thread:
http://www.mobileread.mobi/forums/sh...d.php?t=125517

or the original russian thread:
http://www.the-ebook.org/forum/viewtopic.php?t=16328