What version do you mean by ktechlab 0.3.7 ? I'm using the svn trunk, and
it works for me. Could you send the files with problems?

 
For me svn trunk doesn't work in the simulation, looks some kind of conector problem; flowcode works, but simulation is impossible.
Instead of explain the problem, just a mini video-example:
http://arcachofo.users.sourceforge.net/ktl4

If svn trunk is working for you, then may be there is a problem in my ktl build.... may be some missing library??
I'm compiling in Ubuntu Hardy and i haven't any problem in the compilation.

Any idea??