Hi guys

I have a problem. After jailbreak and unlock (with red/blacksn0w) everything was fine. After some hours I'd lost my internet connection. But not entirely. I can browse web but everything else is down: youtube, cydia (sometimes it show "no connection" and sometimes everything's fine until I try to download something. That "can't connect). It's the same with **********. App starts downloading but after a few seconds it show "failed". I know my 3G works fine otherwise I couldn't browse web. Any ideas?