Slavek,

  I don't know what name change did this, but kdesktop tries to load 'tdmtsak'.
It should be loading 'kdmtsak'. Here is the error generated in .xsession-errors:

[kdesktop] SAK driven secure dialog is not available for use (retcode 6).  Check
tdmtsak for proper functionality.

  I checked and the kdmtsak binary is there:

18:52 tdesru:~> l /opt/trinity/bin/*sak*
-rws--x--x 1 root root 28209 Aug 12 01:21 /opt/trinity/bin/kdmtsak
-rwxr-xr-x 1 root root 24113 Aug 12 01:46 /opt/trinity/bin/tsak


-- 
David C. Rankin, J.D.,P.E.