Plungins in WP 3.1 MS and MailChimp Plugin

Hi

We are setting up a wordpress 3.1 multi site membership with approximately 5000 to 10000 members. Our recommended autoresponder is MailChimp.

We are running into a challenge .

Our goal is to have all 5000 to 10000 members sign up for their individual free MailChimp account. When we set up their individual site using WP 3.1 MS they each get a sub-domain website with admin permissions. We install the MailChimp plugin under the network admin and we do not network activate it.

When we access the sub-domain site using the login access assigned to that admin and look at the plugin we can not see the mailchimp plugin.

However if we login in through the primary site and access the sub-domain we can see the mailchimp plugin.

If we do a network activate the same thing happens.

Any ideas why and how to allow each sub-domain to have access to their own mailchimp plugin set up.

thank you

Andros