pdf view

Hi
I am having problems to 5.2 and pdf view.
I have instsalled the latest plugin and selected the pdfview option that was enabled and pdf view appears on the print pages.
However when I click the link the % box appears but there is no progression.
I have added ini_set("memory_limit","128M"); to the dbcommon file as follows...

<?php

ini_set("memory_limit","128M");

$version = explode('.', PHP_VERSION);

if($version[0]*10+$version[1]<53)

set_magic_quotes_runtime(0);

but this does not help.
Can you please help as I am desparate to get this working.
Many thanks
Gareth