For some reason, I can't get this to work properly with the subscription module. When I set up the subscription payment it does add it as an active subscription in the subscription list initially (notices the received payment from paypal). Then, during the next billing cycle it doesn't notice that the payment was received.

In the logs I found:
uc_paypal_button 06/22/2008 - 7:05am IPN transaction verified. Anonymous
uc_paypal_button 06/22/2008 - 7:05am Receiving IPN at URL for order 20-SUBSCRIPTION. Anonymous

However, at 11:45pm that night, an email goes out:
Dear **@**.com,

This e-mail is to remind you that your payment is due to ** for *** is PAST due. The original due date was on 06/21/2008 - 11:01pm. If you feel you have received this message in error please contact us at **@**.com.

I have a workflow configured, and cron is running without a problem. The workflow is configured as follow:
Conditions:
OR Group
Check Order Balance -> Balance is less then or equal to 0.00
Actions:
Update Order Status -> Payment Received

Any idea on what would cause this?

Thanks in advance,
Zach