klik won't work on my Kubuntu
 

I just installed kubuntu 5.1 and the klik client which said all was ok and i could install software but whenever I klik on any download using konqueror 3.4.3 my computer seems to be installing the program but then an error box pops up saying

Error while trying to run xxxx

where xxxx is the name of anything i try to install using //klik.atekon.de/

Help?
TIA