nokia 9500 error message when trying to navigate

Hey people, when I try an navigate ANY pdf file I get an error message 'CONE 14'and the application closes

Everything works fine other than that feature,which as a major feature is a bit of a drawback.

I have formatted the phone and tried fresh install of reader but still get the same message.

I'm running the latest firmware 5.22

My colleagues 9500 works fine but they are running an older version(with a lot more bugs).

any thoughts

regards