Try the following:
Hit the windows key + R to open the "Launch" window or whatever it is called (search box in the start menu of Vista and 7). Type: "cmd", then hit return. In the console, type "ping loginserver.graalonline.com", hit return. If the ping was successful (packets are being sent and returned), then the problem lies somewhere else. If the output isn't similar to this (beware, German):
HTML Code:
Ping loginserver.graalonline.com [208.43.91.125] mit 32 Bytes Daten:
Antwort von 208.43.91.125: Bytes=32 Zeit=150ms TTL=53
Antwort von 208.43.91.125: Bytes=32 Zeit=149ms TTL=53
Antwort von 208.43.91.125: Bytes=32 Zeit=148ms TTL=53
Antwort von 208.43.91.125: Bytes=32 Zeit=149ms TTL=53
Ping-Statistik für 208.43.91.125:
Pakete: Gesendet = 4, Empfangen = 4, Verloren = 0 (0% Verlust),
Ca. Zeitangaben in Millisek.:
Minimum = 148ms, Maximum = 150ms, Mittelwert = 149ms
Then post whatever the output is so we can further analyze and help you with your problem.