Taken from CJS CD Keys facebook page.
Known Issues with Guild Wars 2:
Guild Wars 2 Beta Access Problem:
We are aware of an issue that some people are having with some particular Guild wars 2 beta keys. As of now, it seems that many thousands of people are having the problem (see the guild wars 2 forums), which suggests this seems to be some kind of game bug. Nevertheless we will be working hard with Guild Wars 2 to resolve the problem and make sure that the problem is to do with the game developer, and not the keys.
We will make sure that all of our customers get exactly what they paid for, or a full refund, don't worry!
Here is the link to their forums
https://forum-en.guildwars2.com/forum/support/account
this is the specific thread where everyone is having the same problem.
https://forum-en.guildwars2.com/for...eta-event-running-right-now/page/34#post49574
The error that customers are getting is the "9:4:5:1093:101" error, which usually means you don't have beta access.
If you didn't get the "Pre-purchase" version of the game with
the right cd-key then you don't get access to the Beta, but this is NOT the case with our keys. We are selling the full version which DOES include the head-start and beta access.
You should have been sent e-mails that you did get into the Beta. This proves that you SHOULD have beta access, and the problem lies with guild wars 2 developers, not our keys.
Guild wars 2 are also aware of the download button in account.guildwars2.com being greyed out / unavailable. Here’s a link to full download and installation instructions:
https://forum-en.guildwars2.com/forum/info/news/Getting-Started
Finally, Guild Wars 2 developers are also experiencing problems with the log-in system, so if you get an error code when trying to log in, please be patient and they should have it fixed shortly.
Guild Wars 2 USA Region Problem:
CJS CD Keys source their keys directly from NCSoft. There is no choice between EU/USA Region. All keys are the uni-region as there is just one type of key. Nevertheless, please send us your affected key and we will forward it to NCSoft, in order to help solve your problem and get it changed to the correct region if necessary. Our supplier stated that right now, Guild Wars 2 developers are suffering problems with their log-in system, which means that customers cannot log into their accounts in order to select the correct region. Once you can properly log in you will be able to switch to the correct region.
For our first Beta Weekend Event (April 27-29), home-world selection and world transfers will work just as they will when Guild Wars 2 launches.
When you log in to the game for the first time, you will have the opportunity to pick any available server, or home world. If you choose to select a home world that is in a different region from where you purchased your game, you will be logged out for a for a short period of time while your account is moved to your new region. Once you have selected a home world, all the characters you create will play on this world and will represent it in our world-versus-world (WvW) format.
all information is on official gw2 site