Blizzard berichtet im Technical Support Forum von einem Fehler beim Verbinden mit Bnet Games für StarCraft und Warcraft Bnet Edition, der bei Win2k, XP und ME auftritt.
The Windows 2000MEXP Winsock will at times return an error relating to certain function calls. When this occurs, StarCraft and Warcraft Battle.net Edition will no longer accept UDP packets through port 6112. This is why you are receiving an error message that states „latency to high“.
When this happens you will not be able to join Battle.net games, and will become disconnected from any game in progress (this issue normally occurs before getting into a game). Older versions of the Windows Winsock do not appear to return this particular error. Keep in mind that StarCraft was not originally designed to work with Windows 2000MEXP.
Lösungsansätze zu dem Problem findet man hier. Blizzard arbeitet an dem Problem und bedankt sich für die Geduld bis dahin.