Brother, I tested the font. It includes the Pashto letters, but their short forms are not there. So they should be added to the font. Those short forms are already there in "Pashto Kror Asiatype" font (There are many fonts, but this font is similar to your font), you can copy them from it and change them a little bit (as you want them). the "Pashto Kror Asiatyp" font is not free.
You can download it from here: www.pathanisation.pakhtosoft.com\pashtokror.zip
Thanks,
Zabeeh khan,
Admin, pathanisation.pakhtosoft.com
P.S:
I am ready for any type of help. Insha'Allah.