Trouble sending e-mails to Adrien

I'm new to the group doing the summaries for the podcasts but it appears that my e-mails to Adrien are not going through?

I get his group e-mails about the podcasts to work on but when I reply to the group, I never see the reply come back in my e-mails. When I look in my "sent" file, I see it listed as sent like all the rest.

When I reply directly to him, he does not appear to be receiving the summary that I sent him.

At least one other person on the group e-mail was able to see my group response and I was able to e-mail him directly and receive his response without a problem.

I use aol which might be the problem?

Thanks