why raspberry pi internet connection doesn't work?

I was using internet connection on raspbian and it was working will. Now after i installed Matlab support package i can't connect to internet . I used the same wire,and router with the both operating systems.

[mohannad]

I solved this issue

[Reitsam Laurenz]

Can you tell me how you solved that problem? I cant get any internet connection anymore

[Jakob Schober]

Does anybody know the answer for this problem. I´m stuck on the same too.

[mahdi tavalaee]

Hi.

I have the same problem too.

please someone tell us, How we can solve this issue?

Thanks