I am having a issue in game, where it looks like i am getting disconnected but i am still in game, i can move type, other people move, fight etc,

But when i cast, it casts but the skills don't work, if i carry on moving, then re log i go back to where i disconnected, some 1 in game said it is a temporary slowed connection,

Any idea how to fix this? i have turned down my firewall, disabled my virus checker and now lowered my graphics, and it is still happening,

My isp is BT, any information on this would be appreciated