I second what Clarity said. You can try to keep on talking to her, even if it doesn't seem like she can hear you. The key is to just keep trying.
Doing that has worked for me in the past, when trying to reach alters I had no communication with. I would just keep talking as though they could hear me... both out loud and inside my head. I kept inviting them to communicate with me and gave them lots of opportunities and ways of doing so. It always worked *eventually*... though most often not as soon as I would have liked!
In my own experience me being open to *whatever* they had to say was a key factor as well. If they sensed I wasn't really willing to hear what they wanted to tell me, then most often it seemed they really weren't willing to tell me anything. Fair enough too really.