Problem with Aweber Integration

Problem:

I have a center popup sign up form integrated with Aweber, but when someone subscribe it send the subscriber to a new window with a Aweber thank you page.

In Aweber sign up Thank You Page settings is in “Stay in Current Page”.

I don’t want Aweber thank you page, I want subscribers stay in my web page when they sign up.

I contact Aweber support and they tell me that is probably a problem with the plugin.

How I can fix this?