||Hi there MRainbow!
Let's see if we can get you back into the game ASAP. Although this problem can indeed be caused when the servers are down for maintenance, there can also be technical issues that can cause this problem, and since it looks like our servers are indeed up and running, it's likely that this is the source of the problem.
For starters, I'd suggest that you look through this article, which contains a lot of information for ensuring that you've got a smooth connection to our servers that isn't being impacted by other network-related issues.
I'd also highly recommend that you go through the steps provided in this article, which can help to ensure that you're not experiencing any interference due to your Internet Explorer settings.
If you find that you're still being presented with the "unavailable" or "undefined" server status when attempting to launch the game, the next step I would recommend would be for you to put in a support ticket here. If you do, there are a couple of pieces of information that I'd suggest you be sure to include:
1. A Network Analysis
2. A NetworkInfo Log
3. A Process List