is not responding -D2 LOD

Hi. Me and my friend planned on playing diablo 2 - LoD again, havent played for years. I downloaded the games, and installed them. I have the same cd-key as have had for ages. When I try to connect to a server I just get “ is not responding. Please try connectin again in a few minutes”. This has been going on since yesterday.

I have read about some ppl getting this as temp bans, but I dont understand how I could be temp-banned as I havent played the game for years. Can some1 tell me what is wrong?