Digital Workshop

I hope someone can help me with this...
If I use the print action to print a page from my pub it works fine.

If I try 'print text file in publication directory' as an action I get the select printer and cancel printing dialogue boxes, but the printing does not actually occur - I get a printing/hourglass that never resolves. (I do publish and test the published pub with the text file in the publish directory)

same thing happens if I try scripting:

doc_to_print = SYSTEM_PUBLICATION_DIR + "opustest.txt" (script on the page show)

and then

PrintFile(doc_to_print,true,true) by clicking a button
what am I missing???