Open a file at windows server 2012

I need a help to open a .PDF file located at a windows server computer
I´m using the Activitystarter and at DataUri : file://

what´s wrong ?
Thanks for a help



Hello Juan,
thanks for your help ! you are right, but now I need to know how can I connect the file that need an user and password for windows ?

Do you have IIS installed with PHP?