custom webview with browser print

I have webview that I want it to communicate with the browser print urgently but for some reason it doesn't read any data from browserprint.js/ browserprint.exe. I use windows with this custom java webview and I have latest browser print 2.1 installed on the windows 7 and zebra barcode label printer GX430T (USB).

Everything works in firefox and chrome but I need the webview to work.

Would love some help.