Cannot print any UML diagrams

Hi all. I'm using ArgoUML 0.24 which I installed on Fedora 
Core 6.

My problem is I cannot print any class diagrams directly 
from ArgoUML. I have to export them as .png files, load them 
into Konqueror web browser, and print them from there. So it 
appears that cupsd and my printer are configured and working 
OK. I can also print other web pages from Konqueror, and 
print ordinary text files from a shell with:

#lp filename.txt

Am I missing something somewhere?

Kind Regards

Keith

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