If you a have questions about the Free Trial Event, please post here.
Some info for you:
- The Trial Event (Refer-A-Friend event) begins at 9:00 AM Pacific Time on Thursday, which is 5:00 PM GMT and 6:00 PM CET. It ends on Sunday night Pacific Time.
- We’re aware that some people are seeing the “Upgrade to a full account” flag even after they purchase Guild Wars 2. We’re looking into this.
- The error message that you see after you’ve downloaded the client basically — while admittedly a bit strangely worded — simply is telling you to come back on Thursday to join the event. In other words, the event is not live yet.

I don’t think the system necessarily is set up to check against this, as it would be entirely fruitless for someone to add a trial code to an existing account.