Upgraded F16->F17: no internet connection

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http://forums.fedoraforum.org – Hi, I just upgraded on my laptop from F16 to F17 through the Fedora DVD. Now I cannot access the internet, neither trough wifi nor through cable. Everything else seems fine until now. I have seen that my Fedora installation still uses the F16 kernel. Is that the problem? Should I download and install a F17 kernel? But how could I do this without Internet? Please help me. Thanks (Maybe the problem has to do with that Fedora 17 has some new changes in the sbin directory structure? When I write dhclient wlan0, it says: error while loading shared libraries: cannot open shared object file: n (HowTos)