Hi Patricia. Thanks for your question.
If I read your question correctly, it sounded like you already tried the setup you’re wanting. If so, could you please detail it here (e.g. iCal link you’re trying to use, the 2 sites you’re trying to connect and which one’s the source and which one’s the receiver of the other’s events — screenshots of your settings, etc)
I wonder if maybe the issue is that you’re trying to import events from an iCal file that only includes this month’s events in the iCal file. If that is the issue, you might want to customize it so it includes more events:
Here: https://gist.github.com/cliffordp/b0e5ece86040d9838f09
Please let me know and I’ll try to help where I can.
Thanks.