problem's with disconect

[QuRa]

Hi

I have a problem when i playing,Ii can play 2 or 3 mins because  I have allways disconect's. I dont know what is going on, my brother playing in WOW and he don't have this problems.When I have disconnect I dont have any information (for example " u r disconnected ") simply the game is stoping and i can't move. I can't do check ful in client  to i dont know why when i press it nothing happens, I downloaded  the full package of dragon network path and overwritting the files. But most problem is the disconnecting because i can't play. I check the ping and when I'm disconnecting it is ok because max is 300ms i thing that is no problem.

I made reinstal game twice, and reinstall windows that not help.
Firewall and Antivir is off

Please for help. With this disconnecting's i can't play

Sry for my english