how to capture recurring payments with paypal

[RussellReal]

    <form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post" name="frmCart" id="frmCart">
        <input type="hidden" name="cmd" value="_xclick-subscriptions" />
        <input type="hidden" name="business" value="paypal+email" />
        <input type="hidden" name="item_name" value="Membership" />
        <input type="hidden" name="currency_code" value="EUR" />
        <input type="hidden" name="no_shipping" value="1" />
        <input type="hidden" name="a3" value="9.97" />
        <input type="hidden" name="p3" value="1" /> 
        <input type="hidden" name="t3" value="M" />
        <input type="hidden" name="src" value="1" />
        <input type="hidden" name="sra" value="1" />
        <input type="hidden" name="notify_url" value="http://notify.com/notify-url/" />
        <input type="hidden" name="custom" value="1000" />
    </form>

That being said, the IPN comes through just fine, and I get 2 IPNs

txn_type = subscr_signup

txn_type = subscr_payment

Both are great, but the "subscr_payment" comes back as "pending" how do I automatically capture this payment?

I could log into my paypal and accept the billing agreements, that works fine, but IPN doesn't get generated when I accept the billing agreements.

So basically my site never "knows" that the billing agreement was accepted and money was received. I'd like to accept the billing agreement when I get the IPN which suggests that the agreement is pending my approval. This way my client doesn't have to log into paypal to accept the agreement.

Many thanks in advance!