that used to happen to me A LOT, but i found out it was because i was using "internet phone" connection ; free wifi.
When i changed ISP, it stopped, thank god. Bad part about these kicks is that... it resets the CP.
i did it all when it used to happen, and nothing worked. setting, change nespeed, get other usur.ini .. nothing worked. So i just assumed it was a internet connection problem.