Google Webfont not working

Hello, I’m trying to use a Google webfont in a banner ad and while it works in my computer which has the font installed, I’m not having any luck on other computers. Seems to always default to a system font. I have little experience with Google webfonts and would appreciate any guidance. I’ve included a screen capture of my head HTML.

I assume you added this via the Add More Fonts option with Google Fonts (vs your own Custom CSS)? Does the Roboto font show up in the fonts list and what happens when you set a text element to use it?

It would be useful to attach a zip of your .hype document.