Hi
I'm very sorry but could you kindly explain a little further. I have outlined the upgrade process below, could I ask if you let me know at what stage the upgrade is going wrong for you and what error you are experiencing.
1. When logged in go to upgrade page "upgrade/renew membership"
2. Check all your details and select "Gold" from the drop down labelled "Membership Level"
3. Press "upgrade/renew membership" button at bottom of the page
4. You will then be sent to a payment page which requires you to enter you card details
5. A confirmation page will be presented before the payment is complete
6. Could you log out and then back in again to make sure your account has been upgraded