this message in my mt4. What is it

Should i be worried? Does it mean anything? It happens like every 5 mins.

2013.07.04 14:20:38     Credits: authorization failed (500)
2013.07.04 14:15:38     Credits: authorization failed (500)
2013.07.04 14:10:38     Credits: authorization failed (500)
2013.07.04 14:05:38     Credits: authorization failed (500)
2013.07.04 14:00:38     Credits: authorization failed (500)
2013.07.04 13:55:38     Credits: authorization failed (500)
2013.07.04 13:50:38     Credits: authorization failed (500)
2013.07.04 13:45:37     Credits: authorization failed (500)
2013.07.04 13:40:37     Credits: authorization failed (500)
2013.07.04 13:35:37     Credits: authorization failed (500)
2013.07.04 13:30:37     Credits: authorization failed (500)
2013.07.04 13:25:37     Credits: authorization failed (500)
2013.07.04 13:20:37     Credits: authorization failed (500)
2013.07.04 13:15:37     Credits: authorization failed (500)
2013.07.04 13:12:51     Credits: authorization failed (500)
2013.07.04 13:10:37     Credits: authorization failed (500)
2013.07.04 13:06:35     Credits: authorization failed (500)
2013.07.04 13:05:37     Credits: authorization failed (500)
2013.07.04 13:00:37     Credits: authorization failed (500)
2013.07.04 12:55:37     Credits: authorization failed (500)
2013.07.04 12:50:37     Credits: authorization failed (500)
2013.07.04 12:45:37     Credits: authorization failed (500)
2013.07.04 12:40:37     Credits: authorization failed (500)
2013.07.04 12:35:37     Credits: authorization failed (500)
2013.07.04 12:30:36     Credits: authorization failed (500)
2013.07.04 12:25:36     Credits: authorization failed (500)
2013.07.04 12:20:36     Credits: authorization failed (500)
2013.07.04 12:15:36     Credits: authorization failed (500)
2013.07.04 12:10:36     Credits: authorization failed (500)