Every time i enter on a server, after 1 min i'm disconnected, i dont have antivirus and the firewall is off, please help!!

(i'm brazillian, sorry from bad english)

how fast is your internet it may be to slow

is 1 mb, and my friend have the same router and can play -.-

Maybe his router is configured differently.

Read the router / firewall related information here:
http://forum.toribash.com/showthread.php?t=22408

Is it a wireless?(wlan) If it is, i'm not surprised.