Economist GMAT Tutor error

[Ag2012]

I just tried signing up for the Economist GMAT Tutor using the link from the GMAT Course Discounts page and it gave me the following error message:

The Promocode PREMIUMFLASHBTG is either invalid or expired.

Please advise.

[Ag2012]

Figured it out. The linked discount code is for an old promotion but the current code, which is shown in the sidebar, works. There's no link that I could find to enter a discount code if you already have made an Economist GMAT account but if you manually enter the url https://crm.gmat.economist.com/plans?promo=BTGMEMBER# it will apply the discount and take you to a payment screen.