PDF printing unknown characters(Square box with X in it)

Hi,

I have a requirement to generate PDF for customer invoice from SAP, my customer would like to use their own specific font(not SAP standard helvetica/Arial). We created a smart form and generate OTF and convert the OTF to PDF, show the PDF content in PDF viewer. When we do this, all the characters and symbols are showing just fine on PDF, but when we print the PDF, it is showing the square box with the X for Currency symbols (Pound(£), Yen(¥)) and Registered mark symbol (®)).

I need to use cascading device type "SWINCF" to print all  unincode characters.

Help me in this regard.

Thanks

Ram