Hello and welcome to DG! Always nice to see new blood 
First I can tell you that the problem is right now the company are moving servers and they will not be up untill mid next week (2-3 days) accordingly to the last info. So you simply have to wait. Which sux I know.
You can play on gameranger meanwhile if you like. But that will be unranked.
Then I would like to welcome you, and give you a heads up. Just because you WILL run into elitist and biggots here who dont accept you into their games cause you are new. Ignore them. There are alot of us who rather play with new people who are fun. Then Older exellent players who behaves like jackasses.
Hosting a game yourself or joining a game that says "beginers" or the like is a good thing.
This is a great community, with everything from fun and cool people, to idiots and quite and the totaly mentaly instaine....thats me.
Welcome, and look me up if you want games. My guess is wednesday you can play, and you should from Impulse cause it gives you statistics over how you are doing.
Best regards
--Maulkin