I have payed the fee but the red message is still showing up. Why?

Note that there is a time lag between when you finish paying on Paypal's site, and for the red message to disappear. The reason is that we get confirmation from Paypal using IPN (Instant Payment notification). There is an inherent lag of few seconds to a minute or so from when you come back from Paypal to the thank you page, and Paypal accessing our site with an IPN notification.

So, just be patient for a minute or two, and the message will disappear. If it is does not, and you got a confirmation email from Paypal that your payment has been successful, then contact someone on this site with your uid, so we can investigate.