TO ALL:
I took this problem from the very distance point. Once I had a problem with my internet connection in my student´s private with some ports, so I solved this problem by using SoftEther VPN software and connect to the another VPN and these problems goes away. I´ve tried this now to solve this problem and it works! :)
I am on 1.5.1. now, so for everybody who has a problem with updating use SoftEther VPN, connect to the any of the VPN and enjoy! :)
PS: THX to everybody who tried to help me :)