I upgraded my MacBook Pro (Early 2009) with a Samsung 830 SSD with 256GB and an iFixit hard drive bay. After cloning my harddrive with Carbon Copy Cloner to the SSD I put the SSD into the MacBook Pro and booted from it. It runs smooth, but Software Update and iTunes (and other apps) can't connect to their servers. Even Dropbox failed, while Google Drive gets a connection after reinstallation. Browsing and mailing havn't problems, too.
Someone could point out a possible reason and fix for that?