ITextSharp PDF is not being printed correctly

I have a a pdf Which I created using ITextSharp. I set the PageSize to A6 and when rendered with acrobat it's being shown correctly. Howev开发者_如何学JAVAer when I print It's only taking about 1/10 of the page. the printer is Zebra TLP 2844

Thanks in advance for your help.

Acrobat's printing arguments should be: /P /H